1

Last Paper’s Questions & New Model Questionsfor Entry Test

Total Questions: 387

GIK Institute,

NUST ,

Agha Khan Medical College,

FAST University,

AIR University

UET and All Medical Colleges

Composed by Shah SabMS from GIK Institute

2

1. From the top of a cliffoverlooking a lake a personthrows two stones. The stoneshave identical initial speed vobut stone1 is thrown downwardat an angle below the horizontalwhile stone 2 is thrown upwardat the same angle above thehorizontal .Neglect airresistance and decide whichstone if either strikes the waterwith the greater velocity

a. both stones strike thewater with same velocity

b. stone1 will strike first andstone 2 later

c. stone2 will strike first andstone 1 later

d. both will not reach thewater surface.

2. A projectile is launched fromand returns to ground level. Airresistance is absent .Thehorizontal range of theprojectile R = 175 m. and thehorizontal component of thelaunch velocity is vox = 25m/s.Find the vertical componentvelocity voy of the launchvelocity

a. Not enough data is givenb. 34 m/sc. 34cm/sd. -34 m/s

3. what is the final value of thehorizontal component vx of theprojectile’s velocity ?(Considerquestion 2)

a. Not enough data is givenb. 34 m/sc. 25m/sd. -34 m/s

4. Suppose you are driving in aconvertible with the top down.The car is moving to the rightat a constant velocity. Asshown in figure you point ariffle straight upward and fire it.In the absence of airresistance, where would thebullet land?

a. behind you ,b. ahead of you orc. in the barrel of the riffle.d. Not enough information

given.5. Suppose you are driving in a

convertible with the top down.The car is moving to the rightat a constant velocity. Asshown in figure you point ariffle straight upward and fire it.In the presence of airresistance, where would thebullet land?

a. behind you , toward therear of the car.

b. ahead of you orc. in the barrel of the riffle.d. Not enough information

given.

6. When a coin is tossed up inthe air, then there are threeparts to the motion of the coin ,on the way up , the coin has avelocity vector that is directedupward and has a decreasing

3magnitude. At the top of its pathcoin immediately has a zerovelocity. On the way down thecoin has a downward pointingvelocity vector with anincreasing magnitude, in theabsence of air ,

a. acceleration of the coil alsochange as velocity

b. acceleration changesduring upward part

c. acceleration changesduring downward part

d. acceleration does notchange throughout themotion.

7. As a projectile movies in itsparabola path , the velocity andacceleration vectors areperpendicular to each other.a. everywhere along its pathb. at the peak of its pathc. nowhere along its pathd. not enough information is

given.

8. An Alaskan rescue plane dropsa package of emergencyrations to stranded hikers .Theplane is traveling horizontally at40.0 m/s at a height of 100 mabove the ground. Where doesthe package strike the groundrelative to the point at which itwas released.?a. 181 mb. 181 cmc. 150md. zero m

9. A long jumper leaves theground at an angle of 20degrees to the horizontal and at

a speed of 11 m/s.How fardoes he jump.a. 384 mb. 7.94mc. 0.722 md. Not enough information

given

10. A passenger at the rear of atrain traveling at 15m/s relativeEarth throws a baseball with aspeed of 15m/s in the directionopposite the motion of thetrain. What is the velocity ofthe baseball relative to Earth?a. zerob. 15 m/sc. 15 m/sd. 30 m/s.

11. Suggest, how can you throw aprojectile so that it has zerospeed at the top of itstrajectory?a. throw it at angle less than

90b. throw it an angle greater

than 90c. throw it an angle of exact

90 with horizontald. throw it an angle of exact

12. You are talking byinterplanetary telephone to afriend who lives on the Moon.She tells you she has just won1 Newton of gold in a contest.Excitedly, you tell her that youentered Earth’s version of thesame contest and also won 1Newton of gold who is richer?a. your friendb. youc. it’s a draw

413. A clever monkey escapes from

the zoo. The zoo keeper finshim in a tree. After failing toentice the monkey down , thezoo keeper point hertranquilizer gun directly at themonkey and shoots .The clevermonkey lets go at the sameinstant the dart leaves the gunbarrel , intending to land on theground and escape. Thena. dart always hits the

monkey regardless of thedarts muzzle velocity

b. dart always hits themonkey depends on thedart’s muzzle velocity

c. dart will not hit monkeyd. not enough information

given.

14. Two trains each having a speedof 30 km/h are headed at eachother on the same straighttrack. A bird that can fly 60km/h , flies off the front of onetrain when they are 60 km apartand heads directly for the othertrain. On reaching the othertrain it flies directly back to thefirst train and so forth. What istotal distance?a. 90 kmb. 30 kmc. 120 kmd. 60 km/h

15. On two different tracks thewinner of one kilometer raceran their races in 2a. min,27.95s and 2

min,28.15s.In order toconclude that the runnerwith the shorter time wasindeed faster how much

longer can the other trackbe in actual length.

b. 3mc. 1md. 1.4 me. 2m

16. An automobile travels on astraight road for 40 km at 30km/h. it then continues in thesame direction for another 40km/h at 60 km/h what is theaverage velocity.a. zerob. 40 cm/sc. 40 m/sd. 40 km/h

17. The magnitude of theacceleration of a moving objectis equal to thea. gradient of a displacement

–time graphb. gradient of a velocity-time

graphc. area below a force-time

graphd. area below a

displacement-time graphe. area below a velocity-time

graph

18. A stone is thrown from P andfollows a parabolic path .Thehighest point reached is T. Thevertical component ofacceleration of the stonea. is zero at Tb. is greatest at Tc. is greatest at Pd. is the same at P and Te. decreases at a constant

rate.

519. A truck is moving forward.

Inside its trailer, a pendulumhangs from the ceiling at restwith respect to the truck. Itmakes an angle of 12 withvertical .Then the speed of thetruck isa. 12 m/sb. 20m/sc. 30 m/sd. We can not calculate the

speed of truck from thegiven information.

20. Which of the following ispossible for a kinetic energyand momentum?a. A system have zero kinetic

energy but non-zeromomentum

b. A system have zeromomentum but non-zerokinetic energy

c. A system can havenegative Kinetic energy

d. None of above is correct

21. A 2-kg particle is located at theorigin and a 1-kg particle islocated on the x-axis at x = 3m.Determine the location of thecenter of mass of this twoparticle system.a. 3mb. 0mc. 1md. None

22. If you are carrying a ballrunning at constant speed andwish to throw the ball so thatyou can catch it as it comesback down should youa. throw the bal at angle of

about 45

b. throw the ball straight in airand you get slowdown tocatch it

c. throw the ball straight andremains standing at thatpoint

d. throws the ball straight inthe air and continue withsame pace.

23. If a the surface of a frozenpond were perfectly smooth sothat it would be impossible towalk across it could you getfrom one part to another by____________ suggest youranswer scientificallya. lying downb. rollingc. jumpingd. crawlinge. None

24. A projectile is fired on Earthwith some initial velocity.Another projectile is fired onethe Moon with the same initialvelocity thena. RM = REb. RM > REc. Rm < REd. None

25. Which of the following is wrongstatementa. sound waves transport

energyb. sound travels in straight

linec. sound waves travel

adiabaticallyd. sound waves travel faster

in vacuum than in air26. When a wave is reflected at a

rarer surface , the change inphase is

6a. 0b. π/2c. πd. 3 π/2

27. Which of the following emitssound of higher pitcha. Mosquitob. Lionc. Donkeyd. Man

28. A man sets his watch by awhistle that is 2 km away. Howmuch will his watch be in error.Given the speed of sound =330 m/s.a. 3sec fastb. 3 sec slowc. 6 sec fastd. 6 sec slow

29. The number of beats heardper second resulting from twovibrationsa. Y1 = Acos 388 πt , Y2 =

Acos384 πt ,b. 4c. 2d. 8e. 4 π

30. If a distant star is comingtoward the earth , then thewavelength of its spectral linesarea. shifted towards higher

wavelengthsb. shifted toward lower

wavelengthsc. not shifted at alld. may shift or may not shift

depending on otherfactors.

31. A source of sound movestowards a stationary listenerwith 1/15th the speed of sound.The ratio of apparentfrequency to real frequency isa. 14: 15b. 15: 14c. 15: 16d. 16: 15

32. At normal temperature andpressure speed of sound in airis 330 m/s .If pressure isdoubled , speed will bea. 165 m/sb. 220 m/sc. 330 m/sd. 465 m/s

33. A tuning fork A of frequency280 Hz gives 5 beats persecond when sounded withanother tuning fork B. Onloading B with a little wax , thenumber of beats per secondbecomes 3 .The frequency ofBa. 275 Hzb. 277 Hzc. 283 Hzd. 285Hz

34. Ultrasonic waves exhibit theproperties ofa. electromagnetic wavesb. transverse wavesc. non-mechanical waved. longitudinal wave

35. If ultrasonic waves and radiowaves have the samewavelength of 1.6 cm , thena. their frequencies are equalb. their velocities are equalc. radio waves have higher

frequency

7d. ultrasonic waves have

higher frequency

36. The range of wavelengths ofthe sound that can be heard bythe human ear isa. 17m to 1.7cmb. 1.7m to 17 cmc. 1.7 m to 1.7 cmd. 1.7 m to 1.7 cm

37. Ultrasonic can be heard by__________ but cannot beheard by _____________a. bats , manb. bats , dogc. man , dogd. man, bats

38. A beam of light coming parallelto itself from infinity has awave-front which isa. sphericalb. cylindricalc. planed. any other shape

39. Newton postulated hiscorpuscular theory on the basisofa. colors of thin filmsb. Newton ringsc. Dispersion of white lightd. Rectilinear propagation of

light

40. Velocity of light according towhich theory is greater than indenser medium than in rarermediuma. corpuscular theoryb. wave theoryc. Electromagnetic theoryd. Quantum Theory

41. Quantum Theory of light wasproposed by

a. Newtonb. Youngc. Maxwelld. Planck

42. Original Huygens’s wavetheory of light could notsatisfactorily explaina. diffractionb. reflection of lightc. interferenced. polarization

43. Wave nature of light does notsupporta. diffraction effectb. photoelectric effectc. interference of lightd. emission or absorption

effect

44. The light waves area. elastic transverse wavesb. longitudinal elasticc. mechanicald. electromagnetic

transverse

45. The range of visible light isa. 4000A---8000Ab. 80000A----0.40 mc. 2000A—3000Ad. 10-14 m –10-12 m

46. The rest mass of photona. infinityb. zeroc. mo/1-v2/c2

d. 4mo

47. The dual nature of light wasenunciated bya. Huygensb. Planckc. Maxwell

8d. De-broglie

48. The phase difference betweenE and B in electromagneticwaves isa. zerob. 90c. 180d. 360

49. All particles of wave-frontvibratea. in same phaseb. in opposite phasec. up and downd. left and right

50. The ratio of E to B inelectromagnetic waves is equaltoa. cb. 1/cc. 4cd. 1/z

51. When a ray of light enter fromair into water then itswavelengtha. decreasesb. increasesc. remains unchangedd. becomes infinity

52. The transverse nature of lightwave is verified bya. reflection of lightb. polarizationc. refractiond. interference of light

53. If amplitude of waves atdistance d from a point sourceis A , then amplitude at adistance 3d is

a. 3Ab. 9Ac. A/9d. A/3

54. A transverse wave is given bythe equation

)1005.0cos(9 txy m for thiswavea. amplitude is 8m and

frequency is 100Hzb. amplitude is 8m and

frequency is 50Hzc. amplitude 8cm and

frequency is 100 Hzd. amplitude is 8 cm and

frequency is 50 Hz

55. The amplitude of a wave isdoubled. Then intensitya. Is doubledb. Is quadrupledc. Remains samed. Is halved

56. If oil of density higher than thatof water is used( in place ofwater) in a resonance tubethen its frequency willa. increaseb. decreasec. remain the samed. depend upon the density

of the material of tube57. The frequency of the third

harmonic of a stretched stringis 294 Hz. Then thefundamental frequency isa. 47 Hzb. 98 hzc. 73.5 Hzd. 54 Hz

58. As an empty vessel is filledwith water, its frequency

9a. increaseb. decreasec. reamisn the samed. non of above

59. Fundamental frequency of anopen pipe of length 1m is equalto the frequency of the firstovertone of a closed pipe oflengtha. 1mb. 1.5mc. 2md. 2.5m

60. A ray of light strikes a glassplate at an angle of 60 .If thereflected and refracted rays areperpendicular to each otherthan index of refraction of glassisa. ½b. 2/3

c. 3/2d. 1.732

61. Which of the followingrepresents Brewster’s Lawa. 1cot p

b. 1cos p

c. 1cos pec

d. 1cot p

62. If the amplitude of the un-polarized light incident on apolarizer is A then amplitude ofthe polarized light transmittedthrough it isa. Ab. A/2c. A/ 2d. None

63. Light waves can be polarizedas theya. are of high frequenciesb. can produce interferencec. can be refractedd. are transversee.

64. Plane polarized light can beproduced bya. mirrorb. a slitc. nicol- prismd. bi-prism

65. when light is polarized theni. its frequency

changesii. its wavelength

changesiii. its velocity changesiv. its intensity

changes

66. A ray of un-polarized light isincident on surface of glassplate of n = 1.54 .If tan 57 =1.54 , angle of refraction isa. 57b. 43c. 90d. 33

67. Which of the following wavescan not be polarizeda. Radio wavesb. UV raysc. X-raysd. Ultrasonic waves

68. Which of the followingphenomena not common tosound and light wavesa. interferenceb. diffraction

10c. coherenced. polarization

69. A body has +4C of charge .Itmeans that it hasa. an excess of 12*109

electronsb. a deficit of 12 *109

electronsc. an excess of 25*1018

electronsd. a deficit of 25 *1018

electrons

70. Which of the following candischarge a certain amount ofcharge on them in shortest timea. sphereb. Cylinderc. Coned. Rectangular pyramid

71. Two point charges one ninetimes as strong as the otherrepel each other with a force of81*10-9 N when placed in airone meter apart .Two chargesarea. + 1nC , + 9nCb. -1nC , - 9nCc. nCnC 9,1 d. + 1 nC , -9 nC

72. The gap in the spark plug is 0.2cm. The potential differenceneeded to produce a sparkgiven that the break down fieldstrength of air is 3*106 V/m willbea. 2000 Vb. 3000Vc. 4000Vd. 6000V

73. A smaller sphere carrying acharge +q1 is placed inside alarger sphere carrying an other

charge + q2. If the two spheresare connected by a copperwire the charge on the smallersphere will bea. q2 –q1b. q1 –q2c. (q1 +q2)/2d. zero

74. A charge placed between twosimilar and opposite charges isslightly displaced from itsequilibrium position .Then it willa. oscillate with respect to

equilibriumb. remain stable in the new

positionc. return back to its initial

positiond. move with uniform velocity

of acceleration

75. A small oil drop of mass 10-6 kgis hanging in at rest betweentwo plates separated by 1 mmhaving a p.d of 490V. Thecharge on the drop isa. 210-11 Cb. 210-8 Cc. 210-6 Cd. 210-9 C

76. A charge Q is placed at themid point of the line joining twosimilar positive equal chargesq and q. The charges q wii bein equilibrium if Q is equal toa. - qb. q/4c. -q/4d. q

77. A proton is moved betweentwo points whose potential

11difference is 20V. The energyacquired by the proton isa. 3210-19 Jb. 3210-16 Jc. 3210-14 Jd. 3210-13 J

78. A cube of side a has charges 4 C at each of the corners. Thepotential at the center of thiscube whose distance from eachcorner is 32 cm will bea. 9 105 Vb. 9 109 Vc. 9 1011 Vd. 721010 V

79. A person standing barefoot onthe ground comes into contactwith a high power line. He islikely toa. experience a mild shockb. experience a moderate

hockc. experience a fatal shockd. remain unaffected.

80. Total electric flux emanatingfrom a unit positive chargeplaced in air is

i.

ii. 1iii. do4

iv. 14 o

81. When 1019 electrons areremoved from a neutral metalplate, the electric charge on itsis (coulomb)a. + 1.6b. – 1.6

c. 10 -19

d. 10 19

82. When a positively chargedconductor is earth connected :a. electrons flow from the

conductor of the earthb. No charge flow occursc. Protons flow from the

conductor to the earthd. Electrons flow from the

earth to the conductor

83. The minimum charge on anobject can bea. once coulombb. one stat- coulombc. 1.610-19 Cd. 3.210-19 C

84. Capacity of a conductordepends ona. the size and shape of the

conductor onlyb. the dielectric medium

surrounding it onlyc. nature of nearby

conductors onlyd. all the above

85. A sheet of plastic is introducedin the space between theplates of a capacitor thena. electric field increases and

capacity decreasesb. electric field decreases

and capacity increasesc. both electric field and

capacity increased. both electric field and

capacity decrease.

86. A current of 16 mA flowsthrough a conductor. The

12number of electrons flowing persecond isa. 1014

b. 1015

c. 10 -17

d. 10 17

87. The resistance of a wire is R.Itis stretched uniformly so that itslength is tripled. The newresistance of the wire isa. 3Rb. Rc. R/3d. 9R

88. A wire of resistance 1ohm isdivided into two halves andboth halves are connected inparallel. The new resistance willbea. 1ohmb. 2 ohmc. 0.5 ohmd. 0.25 ohm

89. Which of the following shownon-ohmic behavior?a. Diodeb. Tungsten wirec. Copper wired. Carbon

90. A piece of copper wire ofresistance R is cut into threeequal parts. They are thenconnected in parallel. Theeffective resistance of thecombination isa. 0.1Rb. 10Rc. 0.01Rd. 100R

91. A number of resistors areconnected in parallel. Theequivalent resistance isa. higher than the highest of

component resistorsb. smaller than the smallest

of component resistorsc. in between the smallest

and highest componentresistors

d. equal to the sum ofcomponent resistors

92. Post office-box works on theprincipal ofa. Galvanometerb. Wheatstone bridgec. Potenio-meterd. Avo-meter

93. P,Q,R and S are theresistances in the four arms ofthe Wheatstone bridge .Thebridge is most sensitive whena. P =Q , and R=Sb. P+Q = R+Sc. P-Q = R-Sd. None

94. Meter bridge is used tomeasurea. chargeb. currentc. resistanced. potential difference

95. In the Wheatstone bridge, Q =10 ohm ; R = 3 ohm ; S =2ohm. Find the P for the fulldeflection of thegalvanometer?a. 5 ohmb. 10 ohmc. 15 ohmd. 20 ohm

13

96. Diamond is extremely hardbecausea. it has hight melting pointb. it is insoluble in all solventsc. it is a covalent solidd. it has largest cohesive

energy

97. In good conductors electricity ,the type of bonding isa. metallicb. ionicc. covalentd. Van-der Wall

98. A hydrogen atom is aparamagnetic. A hydrogenmolecule is aa. diamagneticb. paramagneticc. ferromagneticd. anti-ferromagnetic

99. When the number of turns in acoil is doubled without anychange in the length of the coil ,its self inductance becomesa. 4 timesb. 2 timesc. halvedd. remains unchanged

100. A bulb is connected first withDC and the with AC of samevoltage , then it will shine morebrightly witha. ACb. DCc. brightness will be in ratio

1/1.4d. equally with both

101. The voltage of an AC sourcevaries with time according tothe equation V = 100 Sinπt ,where t is in seconds and V isin Volts. Thena. the peak voltage of the

source is 100 voltsb. the peak voltage of the

source is 50 voltsc. the peak voltage of the

source is 100√2d. the frequency of the

source is 50 Hz

102. The rms value of an ac of 50Hz is 10 amp , The time takenby alternating current inreaching from zero tomaximum value and the peakvalue will bea. 3210-19 Vb. 3210-19 Vc. 3210-19 Vd. 3210-19 J

103. Impurity atoms with which puresilicon should be doped tomake p-type semiconductorare those ofa. phosphorousb. arsenicc. antimonyd. aluminum

104. Semiconductor device isconnected in series with abattery and a resistance. Acurrent is found to passthrough the circuit. If polarity ofthe battery is reversed thecurrent reduces almost to zero.The device may bea. a p-n junctionb. a p-type semiconductor

14c. a n-type semiconductord. an intrinsic semiconductor

105. Width of the depletion line in ap-n junction diode

i. increases whenforward bias isapplied

ii. increases whenreverse bias isapplied

iii. decreases whenreverse bias isapplied

iv. Does not dependon biasing

106. In p-n junction diodei. current is the

reverse biascondition isgenerally small

ii. Forward biascurrent is small ascompare to reversebias

iii. Forward current isindependent of thebias voltage

iv. Reverse biascurrent isindependent of thebias voltage

107. Width of depletion region is ofan unbiased p-n junction is ofthe order of

i. μmii. mmiii. cmiv. nm

108. The charge depletion region ina junction diode is due to

i. Minority carriers

ii. Mobile acceptorand donor ions

iii. Fixed acceptor anddonor ions

iv. Majority carriers

109. Forward biasing of a p-njunction offers

i. Zero resistanceii. Low resistanceiii. High resistanceiv. Infinite resistance

110. In forward bias with ofdepletion in a p-n junctiondiode

i. Decreasesii. Increasesiii. remains constantiv. First increases and

then decreases

111. The typical ionization energyof a donor in silicon is

i. 10eVii. 1eViii. 0.1eViv. 0.001eV

112. Which of the followingrepresents the symbol of n-p-ntransistor?

i. (1)ii. (2)iii. (3)iv. (4)

113. When the p-n junction diode isreverse biased, then

i. Potential barrierincreases

ii. Potential barrierdecreases

iii. Current due to biasincreases

iv. None of these

15

114. Which of the followingstatement is not true?

i. the resistance ofintrinsicsemiconductordecreases withincrease oftemperature

ii. Doping pure Si withtrivalent impuritiesgive p-typesemiconductors

iii. Majority carriers inn-typesemiconductors areholes

iv. A p-n junction canact as asemiconductordiode

115. On increase the reverse bias toa large value in a p-n junctiondiode current

i. Increases slowlyii. Remains fixediii. Suddenly increasesiv. Decreases slowly

116. Region of the transistor whichis heavily doped to producelarge number of majoritycarriers is

i. Baseii. Collectoriii. All are equally

dopediv. Emitter

117. In transistor when electronsflow into the emittera. Holes flow out of collector

b. Holes flow out of emitterc. Some electrons flow into

collectord. Some electrons flow out of

collector

118. N-type semiconductor isa. Neutralb. Negatively chargedc. Positively chargedd. None of these

119. Minority carriers present in a p-type semiconductor are due toa. Addition of impuritiesb. Ionization of impuritiesc. Bias voltaged. Thermal agitation

120. A charge q is moving with avelocity parallel to a magneticfield. Force on the charge dueto magnetic field isa. q v Bb. q B/vc. 0d. B v/q

121. An electron of mass m isaccelerated through a potentialdifference of V and then itenters a magnetic field ofinduction B normal to the lines.Then the radius of the circularpath is

a.m

eV2

b.2

2

eB

Vm

c.eB

Vm2

d.Be

Vm2

2

16122. Two particles X and Y having

equal charges, after beingaccelerated through the samepotential differences enter aregion of uniform magneticfields and describe circularpaths of radii R1 and R2respectively. The ratio of themass of X to that of Y is

a. .2

1

2

1

R

R

b.

1

2

R

R

c.2

2

1

R

R

d.

2

1

R

R

123. A proton and a deuteronhaving the same kinetic energyenter a uniform magnetic fieldnormally. If Rp and Rd be theradii of their trajectories, thena. Rp = Rdb. RD = 2RPc. RD = √2 RPd. RP = √2 RD

124. An electron moves along acircle of radius R in a uniformmagnetic field B. If the field issuddenly reduced to B/3, theradius of the circle becomesa. R/3b. R/9c. 3Rd. R

125. A charge q moves with avelocity v in a magnetic field ofinduction B. If theta is the anglebetween v and B , then Lorentzforce is minimum when

a. θ= 0b. θ= 30c. θ = 90d. θ = 120

126. . Of the following particleswhich will describe thesmallest circle when projectedwith the same velocity normalto the lines of induction of auniform fielda. Electronb. Protonc. Deuteron

d. alpha – particle

127. .Two ions of different massesm1 and m2 but having samecharge and kinetic energy areshot normally into a magneticfield. If R1 and R2 be the radiiof circular paths of ions, thenR1/R2 is equal toa.

2

1

m

m

b.1

2

m

m

c.2

1

m

m

d.1

2

m

m

128. A charged particle moves in astraight line through a certainregion of space. The magneticfield in that regiona. necessarily has a

magnitude of zerob. has a zero component

perpendicular to theparticl’s velocity

17c. has a zero component

parallel to the particle’svelocity

d. none of above

129. The north-pole end of a barmagnetic is held near astationary positively chargedpiece of plastic .Is the plastica. attractedb. repelledc. unaffectedd. None

130. As a charged particle movesfreely in a circular path in theprescence of a constantmagnetic field appliedperpendicular to the particlesvelocity , its kinetic energya. remains constantb. increasesc. decreasesd. None

131. A certain solenoid consists of100 Turns of wire and has alength of 10.0cm.find themagnetic field inside thesolenoid when it carries acurrent of 0.500 A.a. 62.8 mTb. 62.8 Tc. 6.28 mTd. zero

132. The equation of state of nmoles of gas is PV = nRT ,where R is a constant .The SIUnit of R isa. j kg-1 K-1

b. j.g-1 K -1

c. J K-1 mol -1

d. J K -1 per molecule

133. Which one of the followingstatement is NOT true aboutheat?a. 4.18 J mechanical work

produce one calorie ofheat.

b. Heat is a form of energyc. Heat can be completely

converted into useful workunder ideal conditions

d. Heat can be reflected frommirror.

134. Which one of the followingstatement is true about a gasundergoing an isothermalchange?a. The temperature of the

gas remains constantb. The pressure of the gas

remains constantc. The volume of the gas

remains constantd. The gas is insulated from

the surroundings

135. Which one of the following istrue about a gas undergoingan adiabatic change?a. The temperature of the

gas remains constantb. The pressure of the gas

remains constantc. The volume of the gas

remains constantd. The gas is completely

insulated from thesurroundings

136. In a thermodynamic process asystem absorbs 1 Kilo-calorieof heat and at the same timedoes 25o J of work. What is

18the change in internal energy ofthe system?a. 250 Jb. 3950 Jc. 4200 Jd. 4450 J

137. A Carnot engine workingbetween 27C and 127C takesup 800 J of heat from reservoirin one cycle. What is the workdone by Engine?a. 100 Jb. 200Jc. 300Jd. 400J

138. A Carnot engine workingbetween 27C and 127C takesup 800 J of heat from reservoirin one cycle. What is theefficiency by Engine

139. 10 %140. 15 %141. 20 %142. 25 %143. A carnot’s engine whose sink is

at a temperature of 300 K and600 K has an efficiency o f 40%.By how much should thetemperature of the source beincreased so as to increase theefficiency of 60 %.a. 250 Kb. 275 Kc. 300 Kd. 325 K

144. Cooking vegetables and otherfood in a pressure cookersavestime and fuel becausea. under increased pressure ,

water can be made to boilat a temperature muchhigher than 100C

b. under increased pressure ,water can be made to boilat a temperature muchlower than 100C

c. heat losses are reduced toa minimum

d. condensation of steam isprevented

145. The temperature of liquid doesnot increase during boiling.The heat energy suppliedduring this process,a. increases the K.E of the

Molecules of the liquidb. increase the Potential

Energy of the moleculesc. increases both the K.E

and Potenital Energy ofthe molecules

d. is merely wasted since noincrease occurs in the totalenergy of the molecules

146. X-rays and γ-rays are bothelectromagnetic waves .Whichof the following statement iscorrect?a. X-rays in general have

smaller wavelength thanrays

b. X-rays in general havesame wavelength asrays

c. X-rays have largerwavelength than rays

d. X-rays in general havesame frequency as rays

147. In Photolectric effect , thework-function of a metal isa. the maximum energy that

has to be spent to liberateelectron from it

19b. the minimum energy that

has to be spent to liberateelectrons from it

c. the energy required tomake it hot

d. the energy required tomake it ionized

148. The change in wavlenght of X-rays photon when it is scatteredthrough an angle of 90 isa. 0.024Ab. 0.012Ac. 0.048Ad. 0.036A

149. The wavelength of visible lightrange is abouta. 400nm--------- 700nmb. 4000nm------- 7000nmc. 40nm------- 70nmd. 4nm------ 7nm

150. The electromagnetic radiationsare in descending order ofwavelengths in the followingsequencea. infrared , radion , X-rays ,

visible lightb. radio waves, infrared

waves, visible light , X-raysc. radio waves, visible light ,

infrared waves , x-raysd. x-rays , visible light ,

infrared waves, radiowaves

151. If the energies of red and bluephotons of light are representedby Er and Eb thena. Er = Ebb. Er > Ebc. Er < Ebd. Er = Eb/2

152. The speed of anelectromagnetic wave isa. μoξob. 1/ μoξoc. √ μoξod. 1/√ μoξo

153. If there were no atmosphere ,the average temperature onearth surface would bea. Lowerb. Higherc. Samed. 0 C

154. The energy of an X-ray photonis 2 KeV , then its frequencygiven bya. 21018

b. 21017

c. 51017

d. 3.210-16

155. The waves related totelecommunication area. infraredb. visiblec. microwavesd. ultraviolet

156. X-rays are simplya. the conversion of kinetic

energy into radiant energyb. conversion of momentum

into radiant energyc. conversion of mass into

energyd. conversion of charge into

radiant energy

157. The fundamental source of anelectromagnetic wave isa. a steady magnetic field

20b. a steady electric fieldc. a varying magnetic fieldd. a continuous oscillations of

electric charges

158. Which of the following has theshortest wavelength ?a. X-rasysb. Gama-raysc. IR raysd. UV rays

159. A man can take pictures ofobjects even the night usinga. visible lightb. sodium lightc. UV lightd. IR light

160. A photographic plate iswrapped in black paper. It willbe affected bya. infrared raysb. visible lightc. UVd. X-rays

161. X-rays area. stream of fast moving

electronsb. stream of neutral particlesc. stream of positive ionsd. electromagnetic radiations

162. The X-rays wavelength rangeisa. 40 A---------4000 Ab. 4000 A --------7000Ac. 0.01 A-------100 Ad. 700 A--------- 10000A

163. A line emission spectrum isalso known asa. molecurlar spectrumb. an atomic spectrum

c. a pure spectrumd. an impure spectrum

164. When objects in a room areexposed to X-rays then theyappeara. blueb. redc. yellowd. invisible

165. An accelerated electric chargeproducesa. beta raysb. alpha raysc. electromagnetic wavesd. none of above.

166. A photo-cell is an apparatuswhich convertsa. light into electrical energyb. electrical energy into lightc. heat into lightd. None

167. The wavelength of the first lineof Balmer series is 6563 A.The wavelength of first line ofLymen Series will bea. 4861 Ab. 25000 Ac. 7500 Ad. 600 A

168. Wavelength of lighton metal A is twice than offalling on metal B .If maximumkinetic energy ofphotoelectrons emitted intwocases isE and E respectivelythena. EkA = E kBb. E kA = 2 E kB/

Shah Sab MS GIK Institute, 6-06-2006 21c. E kA > E kB/2d. E kA < E kB/2

169. The kinetic energy of theelectron in the first Bohr orbit ofhydrogen atom isa. - 13. 6 eVb. 13. 6 eVc. -27.2 eVd. 6. 8 eV

170. If R is Rydberg constant forHydrogen , the wave-number ofthe first line in the Lyman seriesisa. 3R /4b. R /4c. 2Rd. R /2

171. A diffraction pattern is obtainedby using red light. If red light isreplaced by blue light then

172. bands become broader andfarther aparta. bands dispearb. bands become narrow and

croweded together173. no change in band will take

place

174. On increasing the slit width ,the width of central maximuma. increasesb. remains constantc. decreasesd. zero

175. In a Fraunhoffer single slitdiffraction pattern , , as thedistance on either side fromthe central maximum increase, the witdth of the bright bands__________ hile the dwith ofthe dark bands_____________a. remains the same ,

increasesb. increases , remain the

samec. increases , decreasesd. decreases , increases

176. First diffraction minima due toasingle slit of width 10 -14 cmis at θ = 30 , then wavelengthof the light used I sa. 4000 Ab. 5000 Ac. 6000 Ad. 6250 A

177. Phenomena of diffraction oflight was discovered bya. Girmaldib. Fresnelc. Newtond. Hygens

178. Intereference and diffractioncan be considered as twoeffects whicha. are not at all related to one

anotherb. are complementaryc. can never take place

simultaneouslyd. are always produced but

can never be observed onaccount of the smallwavlenght of light

179. A pointer type galvanometercan be converted into anammeter by

Shah Sab MS GIK Institute, 6-06-2006 22connecting__________in__________a. a high resistance , seriesb. a high resitance , parallelc. a low resistance , paralleld. a low resistance , series

180. The most characteristicsproperty of a liquid isa. fluidityb. formlessnessc. elasticityd. volume conservation

181. Fluid pressure isa. a vector quantityb. a scalar quantityc. sometimes scalar ,

sometimes a vectord. none of these

182. A wooden block floats to acertain level in ordinary water,Ina sea water ita. floats higherb. floats lowerc. floats at the same leveld. sinks

183. When a body is immersed in aliquid completely or partially , itexperiences an apparent lossof weight which is equal to theweight of the displaced liquid.This is known asa. Boyle’s Lawb. Bernoulli’s Principlec. Pascal’s Lawd. Archemede’s law

184. A liquid flowing in a streamlinedmotion possesses

a. potential energyb. kinetic energyc. pressure energyd. All of above

185. A gas blows over a hut. Theforce due to the gale on theroof isa. in the upward directionb. in the downward directionc. in the horizontal directiond. zero

186. Every liquid tends to assumespherical shape becase ofa. gravitional forceb. elastic forcec. surface tensiond. viscous force

187. Surface tension has units o fa. N/m2b. N/mc. N-md. N-m2

188. The tip of the nip of an ink penis split becausea. ink may come into contact

with atmosphereb. ink may raise by capillary

actionc. surface tension of ink is

reducedd. surface tension of ink is

increased

189. Viscosity is exhibited bya. solids onlyb. solids and liquidsc. liquids and gasesd. solids , liquids and gases

190. Which of the following has thegreatest viscosity?a. waterb. castor oilc. mecuryd. glycerine

191. A steel ball A and an aluminumball B of same dimensions aredropped in a pond from thesame height at the same

Shah Sab MS GIK Institute, 6-06-2006 23height at the same time . Thenwhich ball reaches the bottomfirst?a. A reaches the bottom firstb. B reaches the bottom firstc. both A and B reach the

bottom simultaneouslyd. can not be predicted

192. At what common temperatureswould a piece of wood and apiece of metal appear equallyhot or equally cold?a. 0 C

193. 100 C194. 37 C195. none of above196. Bernoulli’s theorem is

applicable to

197. stream line flow of a practicalliquid

198. streamline flow of a ideal liquid199. turbulent flow of an ideal liquid200. flow of any kind201. The equation of continuity of

Fluids is: (a is area , V isvolume)

202. aV-1 = constant203. a2/V = constant204. V/a = constant205. a V = constant

206. Very high temperatures can bemeasured by using

207. gas thermometers208. liquid thermometers209. bimetallic thermometers210. radiation pyrometers211. Solids expand on heating. This

is because

212. potential energy of atomsincreases

213. kinetic energy of atomsincreases

214. total energy of atomsincreases

215. none of above

216. A constant volumethermometer operates on theprincipal ofa. Boyle’s Lawb. Charles]’s Lawc. Archimedes Principald. Gay-Lussac’s Law

217. The coefficient of linearexpansion alpha α, coefficientof area expansion beta ß,coefficient of volumeexpansion gamma γ , arerelated asa. α = 2ß = 3 γb. α = ß = γc. α = ß/2 = γ/3d. None

218. Which of the followingstatements are true?a. good emitters of heat are

good absorber of heatb. good emitters of heat are

bad absorbers of heatc. bad emitters are god

absorbers of heatd. bad emitters are moderate

emitters of heat

219. An ideal black body is thatwhicha. absorbs no radiationsb. absorbs radiations of only

infrared regionc. absorbs radiations of only

one ultraviolet region

Shah Sab MS GIK Institute, 6-06-2006 24d. absorbs all wavelengths

ranging from zero to infinity

220. A black skin person ,experiences in comparison towhite skin persona. more hot and more coldb. less hot and less coldc. more hot and less coldd. less hot and more cold

221. A piece of red glass whenheated to red hot state in darkwill appear to bea. redb. greenc. whited. invisible

222. The temperature of a gasincreases by 10 C .What is theequivalent increase on thekelvins scale?a. 10 Kb. 0 Kc. 100 Kd. 273. 90 K

223. If the volume of the gas is to beincreased by 4 times ,a. temperature must be

doubledb. increased by four timesc. at constant temperature ,

the pressure must beincreased four times

d. it can not be increased

224. A bird flying high up in air doesnot cast shadow on the groundbecausea. light rays coming from the

sun are almost parallelb. the ground lies beyoung

the umbral zone of theshadow

c. the size of the bird issmaller than that of earth

d. the shadow is too faint fordetection

225. For a spherical mirrora. R < 2 fb. R > 2fc. R = 2fd. R= and f are not related

226. Which of the following canproduce virtual imagea. concave mirrorb. convex mirrorc. convex lensd. all of these

227. The speed of light wasdetermined for the first time bya. Newtonb. Fizeauc. Galileod. Romer

228. During reflection and refractionat a plane surface , light travelsin the minimum path . This isknown asa. Huygen’s Principleb. Fermat’s Principlec. Snell’s Lawd. Principal of reversibility

229. A fish at the bottom of a lake6m deep. To an observerdirectly above , it appears tobe at 4.5 m .The refractiveindex of water isa. ¾b. 3/5c. 5/3d. 4/3

Shah Sab MS GIK Institute, 6-06-2006 25

230. The critical angle for themedium of a prism is C and theangle of prism is A. Then therewill be no emergent ray whena. A < 2 Cb. A > 2 Cc. A = 2 Cd. A >= 2 Ce.

231. A ray of white light passesthorugh a prism. The ray whichdeviates least isa. violetb. bluec. yellowd. red

232. The brilliance of diamond is duetoa. refraction onlyb. dispersion onlyc. total internal reflectiond. dispersion and total

internal reflection233. A curved mirror has one focus

while a lens has one focuswhile a lens hasa. one focusb. two focic. more than two focid. no focus

234. A convex lens of focal length fproduces a real imagemagnified x times the size ofthe object. Then the objectdistance isa. (x + 1 ) fb. (x -1 ) fc. (x – 1 ) f/ xd. (x + 1) f /x

235. Spherical aberration can beminimized usinga. mechanical stopsb. lenses of large focal lengthc. plano-convex lenses

d. any of these236. Chromatic aberrations in a lens

is due toa. intereferenceb. refractionc. dispersiond. diffraction

237. The final image in anastronomical telescope isa. real and erectb. virtual and invertedc. real and invertedd. virtual and erect

238. If height of man is 6m thenminimum height of a planemirror in which he can see hisfull image isa. 4.5 mb. 6 mc. 7.5 md. 3 m

239. When a ray of light enters aglass slab , thena. its frequency changeb. its frequency and velocity

changec. its frequency and

wavelength changed. its frequency does not

change

240. Optical fibers are based ona. total internal reflectionb. less scatteringc. refractiond. less absorption coefficient

241. For shaving and make upconcave mirrors are preferredbecausea. they produce real image

Shah Sab MS GIK Institute, 6-06-2006 26b. they produce virtual

magnified image when theobject is placed between fand R

c. they produce a virtualmagnified image when theobject is place betweenpole and F

d. they produce a magnifiedimage for all positions ofobject

242. The speed of light in vacuum is3 * 10 8 m/s. The speed of lightin a medium of refractive index2 will bea. 3 * 10 8 m/sb. 1.5 * 10 8 m/sc. 2 * 10 8 m/sd. 6 * 10 8 m/s

243. The image of an objectpositioned at twice the focallength of diverging lens wil bea. of the same size as the

objectb. invertedc. enlargedd. virtual

244. The graph between the objectdistance along X-axis and theimage distance along y-axis fora convex lens isa. a straight lineb. a parabolac. a circled. a rectangular hyperbola

245. The focal length of a convexlens is 2.5 cm. Its magnifyingpower will bea. 25b. 52c. 11d. 1.1

246. The power of convex lens isa. negativeb. positivec. zerod. imaginary

247. The radius of curvature of aconcave mirror is 80 cm .iffocal length in meter will bea. 0 .40 mb. 0.20 mc. 0.80 md. 0.10 m

248. The radius of curvature ofconvex mirror is 40 cm. then itstotal length isa. 1.20 cmb. 40 cmc. -20 cmd. – 40 cm

249. Mirage is due toa. reflectionb. refractionc. total internal reflectiond. None

250. Total internal reflection canoccur when light passesa. from denser to rarer

mediumb. from rarer to denser

mediumc. from one medium to

another medium of equalrefractive index.

d. None251. The power of a lens is

measured ina. Candelab. Luxc. Diopterd. Weber

Shah Sab MS GIK Institute, 6-06-2006 27252. A person who can read a print

at 80 cm wants to read thesame at 25 cm . The power ofthe lens he should usea. - 2.75 Db. + 2. 75 Dc. 5. 25 Dd. – 5. 25 D

253. A small object is placed 10 cmin front of a plane mirror.If youstand behind the object 30 cmfrom the mirror and look at itsimage , for what distance mustyou focus your eyes?a. 80 cmb. 40 cmc. 20 cmd. 60 cm

254. Which of the following is not afundamental quantity?a. lengthb. temperaturec. electric charged. ampere

255. The system of units followed(now a days) in science isa. cgs systemb. mks systemc. fps system

d .S.I system

256. Which of the following is not aunit of distancea. angstromb. Fermic. Jouled. Parsec

257. How many wavelengths of Kr 86

are there in I meter?a. 1553164.13b. 1650763.73c. 2348123.73d. 652169.13

258. A micron is related tocentimeters asa. 1 micron = 10 -4 cmb. 1 micron = 10 -6 cmc. 1 micron = 10 -8 cmd. 1 micron = 10 -10 cm

259. Dimensions of angular velocityisa. M0L0T-1

b. MLT -1

c. M L T2

d. ML2T

260. The dimensions of light yeararea. Tb. Lc. LT -1

d. T -1

261. The dimensions of which of thequantities of the following pairsare same ?a. light year and wavelengthb. power and workc. energy and powerd. frequency and time

262. One Fermi equalsa. 10 -6 mb. 10-8 mc. 10-15 md. 10-10 m

263. Which of the following is not aunit of time ?a. Lunar Monthb. Leap Yearc. Second Pendulumd. Solar day

264. The expression ML -1 T-1

represents

Shah Sab MS GIK Institute, 6-06-2006 28a. forceb. momentumc. pressured. coefficient of viscosity

265. A force of 6 kg wt and another8 kg wt can be applied toproduce the effect ofa singleforce equal toa. 1 kg wtb. 10 kg wtc. 16 kg wtd. 0 kg wt

266. A particle is moving on acircular path with constantspeed v. What is the change inits velocity after it hasdescribed an angle of 60 ?a. v 2

b. v 3

c. vd. 2v

267. A pendulum is suspended fromthe roof of a car. The car ismoving with an acceleration of49 cm /s -2. By what angle tothe vertical its strings will beinclined?a. 0.b. 3c. 1 0 nearlyd. 30 nearly

268. Two vectors A and B are suchthat A2 + B2 = C2 and A + B = C.Which of the followingstatements is correct?a. A is parallel to Bb. A is anti-parallel to Bc. A is perpendicular to Bd. A and B are equal in

magnitude

269. If the magnitudes of vectors A,B and C are 12 , 5 and 13units respectively and A + B =C , the angle between vectorsand A and B isa. 0b. c. /2d. /4

270. Two persons are holding arope of negligible weight tightlyat its ends so that it ishorizontal .A 15 kg weight isattached to the rope at the midpoint , which is now no longerhorizontal .The minimumtension is required tostraighten completely the ropeisa. 15 kg.b. 7. 5 kgc. 30 kgd. infinite largee. Not enough information is

given271. Two forces each of magnitude

H have a resultant of the samemagnitude F. The anglebetween the two forces isa. 45b. 120c. 150d. 60

272. For the resultant of the twovectors to be maximum whatmust be the angle betweenthem ?a. 0b. 60c. 90d. 180

273. A car X is going to towardswest at a speed of 12 m/s.Another car Y is going

Shah Sab MS GIK Institute, 6-06-2006 29towards northa at a speed of 5m/s. What is the velocity of theCar X with respect to the car Y?a. 7 m/sb. 17 m/sc. 13 m/sd. 7/5 m/s.

274. Which of the following pairs ofdisplacements can not beadded to give a resultantdisplacement of 2 m ?a. 1 m and 2 mb. 1 m and 1 mc. 1 m and 3 md. 1 m and 4 m

275. How many minimum number ofcoplanar vectors havingdifferent magnitudes can beadded to give zero resultant?a. 2b. 3c. 4d. 5

276. The length of a second’s handin a watch is 1 cm .The changein its velocity is 15sec isa. zerob. /30 2 cm/sc. /30 cm/sd. /30 * 2

277. A bird flying towards north witha velocity 40 km/hr and a trainis moving with velocity 40 km/hr towards north. What is thevelocity of the bird noted by aman in the train?a. 40 2 km /hr north-Eastb. 40 2 km/hr south -Eastc. zerod. 40 2 km/hr south East.

278. If A and B are two vectors ,then tick the correct statement:

a. A + B = B+ Ab. A – B = B- Ac. A B = B Ad. None of above

279. If A and B are two vectors ,then tick the wrong statement:a. A + B = B+ Ab. A – B = B- Ac. A B = - B Ad. A. B = B. A

280. If is the angle between thevectors a = I + j and b= j + kthen sin isa. ½b. 1/ 2

c. 3 /2d. 0

281. A particle is simultatneouslyacted upon by two forces equalto 4N and 3N. The net force onthe particle isa. 7 Nb. 5 Nc. 1 Nd. between 1 N and 7 N

282. Identify the vector quantitya. timeb. workc. heatd. angular momentum

283. Identify the scalar quantitya. forceb. accelerationc. displacementd. work

284. The vector sum of N coplanarforces , each of magnitude F ,when each forces is making anangle of 2. /N , what thatpreceding it , isa. Fb. NFc. NF /2d. Zero

Shah Sab MS GIK Institute, 6-06-2006 30285. Any vector in an arbitrary

direction always be replaced bytwo (or three)a. parallel vectors which have

the original vector as theirresultant

b. mutually perpendicularvectors which have theoriginal vector as theirresultant

c. arbitrary vectors whichhave the original vectors astheir resultant.

d. It is not possible to resolvea vector

286. A dimensless vector ofmagnitudea. a single vectorb. isolated vectorc. unit vectord. neutral vector

287. The vector A and B are suchthat A + B = B – A thena. A + B = 0b. A – B = 0c. A = 0d. B = 0

288. A hall has the dimensions 10 m 12 m 14 m. A fly starting atone conrner ends up at adiametrically oppositecorner.What is the magnitudeof its displacement?a. 17 mb. 26 mc. 36 md. 21 m

289. A body is at rest under theaction of three forces . Two ofthe forces are F1 = 3i and F= 5j .The third force isa. 3i + 5 jb. 5 i _ 3jc. – ( 3i + 5j )d. 3 i -5 j

290. The sum of the magnitudes oftwo forces acting at a point is 8N and the magnitude of theirresultant is 4N. If resultantmakes an angle of 90 with thesmaller force , the two forcesarea. 1 Nb. 2N , 6Nc. 3 N , 5 Nd. 4N , 4 N.

291. The scalar and vector productof two vectors are 5 3 and 5respectively. The anglebetween them isa. 30b. 45c. 60d. 90

292. If y = a +bt + ct2 , where y is inmeter , and t is in secondsthen the unit of C isa. mb. s -2

c. m/sd. m/s2

293. A ball of mass 2 kg is movingon a horizontal frictionlesssurface with constant velocity 8m/s , , then the force exertedon the ball isa. 10 Nb. 20 Nc. 40 Nd. None of above.

Shah Sab MS GIK Institute, 6-06-2006 31

294. Which of the followingstatement is false.a. If an object A exerts a force

F on object B, then Bexerts a force of –F on A.

b. The net external forceacting on an object is equalto the rate of change of it’slinear momentum.

c. The increase in potentialenergy of an object isequal to the work done onit by a conservative force.

d. When an object loseskinetic energy, its potentialenergy always increasesby the same amount.

e. Kinetic energy isconserved in an elasticcollision.

295.Complete the followingstatement: The term net forcemost accurately describesa. the mass of an objectb. the inertia of an object.c. the quantity that causes

displacement.d. the quantity that keeps an

object moving.e. the quantity that changes

the velocity of an object.

296. A horse pulls a cart along a flatroad. Consider the followingfour forces that arise in thissituation.a. the force of the horse pulling

on the cartb. the force of the cart pulling

on the horsec. the force of the horse

pushing on the road

d. the force of the roadpushing on the horse

297.. Which two forces form an"action-reaction" pair thatobeys Newton's third law?a. 1 and 4b. 1 and 3c. 2 and 4d. 3 and 4e. 2 and 3

298.Consider the following diagram,which consists of a block beingpulled by a force P.

Which one of the following actionswill increase the frictional force onthe block?

a. increasing the contactsurface area

b. decreasing the contactsurface area

c. increasing the weight ofthe block

d. decreasing the speed ofthe block

Shah Sab MS GIK Institute, 6-06-2006 32e. increasing the angle made

by the rope299. At a playground, a child slides

down a slide that makes a 42°angle with the horizontaldirection. The coefficient ofkinetic friction for the childsliding on the slide is 0.20.What is the magnitude of heracceleration during her sliding?a. 4.6 m/s2b. 5.1 m/s2c. 5.4 m/s2d. 6.3 m/s2e. 9.8 m/s2

300. Sara puts a box into the trunkof her car. Later, she drivesaround an unbanked curve thathas a radius of 48 m. Thespeed of the car on the curve is16 m/s, but the box remainsstationary relative to the floor ofthe trunk. Determine thecoefficient of static friction forthe box on the floor of the trunk.a. 0.42b. 0.54c. 0.17d. 0.33e. This cannot be determined

without knowing the massof the box.

301.A 1500-kg car travels at aconstant speed of 22 m/saround a circular track that hasa radius of 85 m. Whichstatement is true concerningthis car?a. 0.42b. 0.54c. 0.17d. 0.33

e. This cannot be determinedwithout knowing the massof the box.

302. 1500-kg car travels at aconstant speed of 22 m/saround a circular track that hasa radius of 85 m. Whichstatement is true concerningthis car?a. The velocity of the car is

changing.b. The car is characterized

by constant velocity.c. The car is characterized

by constant acceleration.d. The car has a velocity

vector that points alongthe radius of the circle.

e. The car has anacceleration vector that istangent to the circle at alltimes.

303. A spring has a length of 10 cmwith a spring constant k = 500N/m. A force is applied whichcauses the string length tochange to a final length of 20cm. What is the magnitude ofthe work done by the force?a. 1 Jb. 2.5 Jc. 10 Jd. 25 kJe. 100 kJ

304. Which one of the followingchoices is an example of aconservative force?a. tension

Shah Sab MS GIK Institute, 6-06-2006 33b. motor propulsion forcec. normal forced. elastic spring forcee. static frictional force

305. In the figure, if the tension instring 1 is 34 N and the tensionin string 2 is 24 N, what is themass of the object shown?(Note the angle marked is 40)a. 7.3 kgb. 5.5 kgc. 1.8 kgd. 3.7 kge. 4.5 kg

306. A 2.0-kg projectile moves fromits initial position to a point thatis displaced 20 m horizontallyand 15 m above its initialposition. How much work isdone by the gravitational forceon the projectile?a. +0.29 kJb. –0.29 kJc. +30 Jd. –30 Je. –50 J

307. Two satellites are placed ingeosynchronous orbits, orbitswith a period of 24 hours,where each satellite hoversover a spot on the Earth’sequator. Satellite B has threetimes the mass of satellite A.What is the relationshipbetween the magnitudes of thegravitational forces of the Earthon the two satellites?

a. FB = 91FA.

b. FB = 31FA.

c. FB = FA.d. FB = 3FA.e. FB = 9FA.

308. 20 J of work is done inaccelerating a 4 kg mass fromrest across a horizontalfrictionless table. The totalkinetic energy gained by themass isa. 4 Jb. 5 Jc. 10 jd. 20 Je. 80 J

Shah Sab MS GIK Institute, 6-06-2006 34309. A motor rated at 50 W

accelerates an object along ahorizontal frictionless surfacewith an average speed of 2m/s. What force is supplied bythe motor in the direction ofmotion? (assume 100 %efficiency)a. 200 Nb. 100 Nc. 50 Nd. 25 Ne. 0.04 N

310. A crane raises a 100 N weightto a height of 50 m in 5seconds. The crane does workat the rate ofa. 8 * 10 -1 Wb. 2 * 10 1 Wc. 1 * 10 3 Wd. 5 * 10 4 We. 100 W

311. As the power of a machine isincreased , the time required tomove a body by a fixeddistancea. decreasesb. increasesc. remains the samed. decreases to zeroe. is negligible

312. When a body moves at aconstant speed against frictionon a horizontal tabletop , thereis an increase in the object’sa. A temperatureb. kinetic energyc. potential energyd. acceleratione. weight

313. A ball is thrown upwards fromthe earth surface. While theball is rising , its gravitationalpotential energy will

a. decreaseb. increasec. remain the samed. decrease to zeroe. be negligible

314. As a body slides across ahorizontal surface, thegravitational potential energyof the object willa. decreaseb. increasec. remain the samed. increase from zero valuee. decrease to zero value

315. A 4 kg mass falls freely for 5 mnear the surface of the Earth .The total kinetic energy gainedby the object during its free fallis approximatelya. 400 Jb. 200 Jc. 100 Jd. 50 Je. 20 J

316. When the speed of an object ishalved, its kinetic energy isa. quarteredb. halvedc. the samed. doublede. quadrupled

317. A 4 N book falls from a table0.5m high. After falling 0.25 m ,the book’s kinetic energya. 1.0 Jb. 10 Jc. 2 Jd. 9.8 J

Shah Sab MS GIK Institute, 6-06-2006 35e. 20 J

318. A force of 40 N pushes a 25 kgobject across a level floor for4m. The work done in J isa. 10b. 100c. 160d. 4000 Je. 1000 J

319. A 10 N block falls freely fromrest a point 3.0 m above thesurface of the Earth .Withrespect to the surface of theEarth, what is the gravitationalpotential energy of the block-Earth system, \m after the blockhas fallen 1.5 m.a. 10 Jb. 15 Jc. 30 Jd. 30 Je. 60 J

320. Which mass has the greatestgravitational potential energywith respect to the floor?a. 50-kg mass resting on the

floorb. 3-kg mass 10 m above the

floorc. 10 kg mass 2m above the

floord. 6 kg mass 5m above the

floore. 1000 kg mass resting on

the floor.

321. A body is lifted at constantspeed a distance H above thesurface of the Earth in a time t .

the total potential energygained by the body is equal toa. average force applied to

the objectb. total weight of the objectc. total work done on the

objectd. total momentum gained by

the objecte. total work done per unit

time

322. If the radius becomes half of itsinitial value and velocityincreases by a factor of 3factor then the magnitude ofcentripetal accelerationa. increases by a factor 6b. decreases by a factor 9c. increases by a factor 18d. increases by a factor 24

323. A motor cyclist in death wellrevolving with speed of 5 m/suniformly in circular motion , hedoest fall down to earthbecausea. his weight is balanced by

weight of the motor-cycleb. his weight and motorcycle

weight both are zeroc. his weight and motor-cycle

weight both balanced byfrictional force betweentires and surface of thewell

d. none324. Earth revolves around the Sun

with uniform angular speed thenet force acting on the Earth isa. zerob. frictional forcec. Normal forced. None

Shah Sab MS GIK Institute, 6-06-2006 36325. An electron revolves around the

Nucleus , its circular motiondue toa. gravitational force of

Nucleusb. gravitational force of

electronc. coulomb attractive forced. coulomb force and

gravitational both326. In vertical circular motion of a

stone attached to a string , thetension in the string at themiddle isa. equals to weight of the

stoneb. centripetal forcec. centripetal and weightd. zero

327. In Hooks law the restoring forceis equal toa. F = kxb. F = -kxc. F = mad. F = mg

328. Rotational inertia depends uponthe mass anda. distance of mass from

certain reference pointb. square of the distance of

mass from certainreference point

c. does not depend ondistance

d. only depends on angularvelocity

329. The angular momentum of anisolated system remainsconstant if the net torque isequal toa. applied forceb. angular speed

c. angular momentumd. zero

330. Direction of torque isa. parallel to the axis along

which force actsb. perpendicular to axis of

rotationc. does not depend on

direction because torque isscalar

d. none331. Rainbow appears in the sky

due toa. reflection of lightb. refraction of lightc. dispersion of lightd. all of above

332. The ratio of velocity of light inthe medium to the velocity oflight in the vacuum is equal toa. nb. 1/nc. n2

d. 2ne. frequency

333. The index of refraction n isa. always greater than oneb. always less than onec. may be greater than or

less than oned. index of refraction is only

integer number334. The index of refraction is

a. inversely proportional tospeed of wave

b. directly proportional tospeed of wave

c. equal to speed of lightd. none

335. The greater the index ofrefraction in a material thea. greater the wave speedb. slower the wave speedc. doest have any relation

Shah Sab MS GIK Institute, 6-06-2006 37d. first increase then

decrease336. when a wave passes from one

material into a second materialwith larger index of refractionthen the wave speeda. increasesb. constantc. decreasesd. not enough information

given we should know thefrequency also

337. the wavelength of a wave in amedium is given by 474 nmwith index of refraction of 1.34then the wavelength of thesame wave in vacuum will bea. 633 nmb. 474 nmc. we can not calculate from

the given informationd. 474 A

338. Polarization is a characteristicof alla. wavesb. transverse wavesc. longitudinal wavesd. both longitudinal and

transverse339. If the earth had no atmosphere

the sky will look like in day timea. Redb. Bluec. Blackd. white

340. The sky is blue in day time andsun-set is red , these processdue to thea. scattering of lightb. refraction of lightc. diffraction of lightd. all of above

341. plane mirror produces an imagethat is thea. double size of the object

b. same size of the objectc. depends upon the positiond. none

342. Which of the following is nottrue about plane mirrors aplane mirror cana. not give us larger imageb. give us an image of the

same sizec. give us real imaged. all of the above

343. When the object point P is veryfar from the spherical mirrorsi.e. p =α the incoming rays area. parallelb. mixture of parallel and

normalc. non-convergingd. none

344. Any lens that is thicker at itscenter than its at its edges isa

345. converging lensa. will have positive Fb. will have negative fc. both a and bd. all a , b and c

346. Any lens that is thicker at itsedges than at its center isdiverging lens thena. f is positiveb. f is negativec. some positive and

negatived. depends upon the position

of object347. A projector for viewing slides ,

digital images or motionpictures operates very muchlike aa. camerab. camera in a reversec. eyed. plane mirror

Shah Sab MS GIK Institute, 6-06-2006 38348. Cameras , eyeglasses and

magnifiers usea. a single lensb. two lensesc. three lensesd. depends upon the person

who use it349. Microscope and Telescope

a. need two lensesnecessarily

b. need one lens onlyc. it may be one , two or threed. Telescope does not need

any lens350. When two or more waves

overlap, the resultantdisplacement at any point isfound bya. adding the instantaneous

displacementsb. multiplying the

instantaneous amplitudesc. dividing the displacementsd. none

351. Interference effects of light areseen whena. waves are monochromaticb. coherentc. the two slits are closed

nearbyd. all of above

352. Two sources of waves are saidto be coherent when the twosources area. of same frequencyb. same amplitudec. have a constant phased. all of above

353. In a two –slit interferenceexperiment, the slits are 0.20mm apart, and the screen is ata distance of 1.0 m. The third

fringe is found to be displaced7.5 mm from the central fringe.Find the wavelength of the lightuseda. 300 nmb. 500 Ac. 500 nmd. 50 cm

354. You shine a tunable laser on apair of closely spaced slits.The light emerging from thetwo slits producing aninterference pattern on ascreen. If you adjust thewavelength so that the laserlight changes from red to blue,how will the spacing betweenbright fringes change?a. remains sameb. increasec. decreased. first increase then

decrease355. Suppose two glass plates are

two microscope slides 10. 0cm long. At one end they are incontact; at the other end theyare separated by a piece ofpaper 0.0200 mm thick. Whatis the spacing of theinterference fringes seen byrefection? Assumemonochromatic light ofwavelength in air = 500 nma. m(1.25 nm)b. m(1.25 cmc. m(1.25 nm)d. zero

356. An important experimentaldevice that uses interferenceto calculate very small distancevery precise isa. Newton’ Ringsb. Young’s Slit diffraction

Shah Sab MS GIK Institute, 6-06-2006 39c. Telescoped. none

357. A Michelson interferometer isused with light of wavelength605.78 nm.If the observerviews the interference patternthrough a telescope with acrosshair eye-piece, how manyfringes pass the crosshairswhen mirror M2 moves exactlyone centimeter?a. 1500b. 3000c. 1600d. 33,015

358. How far must the Mirror M2 ofthe Michelson interferometer bemoved so that 1800 fringes ofHe-Ne laser light of wavelength= 633 nm move across a line inthe field of view?a. aaab. aaac. aaad. aaa

359. When a light from a pointsource falls on a straight edgeand casts a shadow , then theshadow never perfectly sharp ,the reason for this effect isa. diffractionb. interferencec. polarizationd. all of above

360. The phenomena in whichinterference phenomena oflaser produces a threedimensional image is calleda. reflectionb. double-reflectionc. holographyd. none

361. Which of the following is nottrue about diffraction

a. sound waves can notproduce diffraction aroundan edge

b. sound waves can producediffraction around edges

c. light waves can notproduce diffraction aroundedges of buildings

d. Light waves can producediffraction around edges ofthickness smaller than thewavelength of light.

362. In diffraction grating equationdsinθ = m λ , if m = +2 thediffraction obtained is calleda. first orderb. zero orderc. third orderd. none

363. If the number of slits per mm is600 then the grating space orelement is equal toa. 1.67 nmb. 1670 nmc. 1670 Ad. 1.67 mm

364. The Braggs condition fordiffraction of X-rays through acrystal isa. dsinθ = 2m λb. dsinθ = m λc. dsinθ = m λ/2d. dsin2θ = m λ

365. After an airplane takes off, ittravels 6 km West, 3km north,and 2 km up, how far is it fromthe takeoff point?a. 12 kmb. 7kmc. 13 kmd. 11 km

366. How far are you from yourstarting point if you firsttraveled 4.0 km due west, then4.00 km due south?

Shah Sab MS GIK Institute, 6-06-2006 40a. 5.66 kmb. zeroc. 16 kmd. none

367. In acceleration-time graph , if astraight line is parallel to x-axisthena. motion is a constant

velocityb. motion is increasing

accelerationc. motion is constant speedd. motions is acceleration

decreasinge. none

368. If you toss a ball upward with acertain velocity, it falls freelyand reaches a maximum heighth .What maximum height doesthe ball reaches if you throw itupward with double the initialvelocity?a. hb. 2hc. 3hd. none

369. If the acceleration a isincreasing with time , will the v-time graph be aa. straight lineb. concave upc. concave downd. none

370. Projectile Motion is acombination ofa. motion with constant

horizontal velocity andconstant vertical velocity

b. motion with constanthorizontal velocity andconstant verticalacceleration

c. motion with variablehorizontal velocity andconstant vertical motion

d. None371. You toss a ball from your

window 8.0m above theground .When the ball leavesyou hand , it is moving at 10m/s at angle of 30 below thehorizontal , how far horizontallyfrom your window will the ballhit the ground?(ignore airresistance)a. 9.2 mb. 9.8 mc. 4md. none

372. When a particle moves in acircle with constant speed themotion is calleda. angular motionb. circular motionc. spiral motiond. uniform circular motion

373. In a Non-uniform circularmotion there is a also acomponent of acceleration thatisa. parallel to instantaneous

velocityb. perpendicular to

instantaneous velocityc. along the radiusd. No component parallel to

instantaneous velocity374. The compass of an airplane

indicates that is headed duenorth, and its airspeedindicator shows that is movingthrough the air at 240 km/h .Ifthere is a wind of 100 km/hfrom west to east , what is thevelocity of the airplane relativeto the Earth?

Shah Sab MS GIK Institute, 6-06-2006 41a. 260 km/hr , 23 East or

Northb. 260 km/hr , North of Eastc. 260 km /hr , West of Northd. 260 km/hr , East of West

375. A gymnast with mass mG = 50kg suspends herself from thelower end of a hanging rope.The upper end of the rope isattached to the gymnasiumceiling. What is the tension atthe top of the ropea. zerob. 490 Nc. T+Wd. None

376. An elevator and its load have atotal mass of 800 kg .Theelevator is originally movingdownward at 10 m/s , it slowsto a stop with constantacceleration in a distance of25m.Find the tension T in thesupporting cable with theelevator is being to rest?a. 1540 Nb. 9440 Nc. 2 Nd. zero

377. A 50 kg man stand on abathroom scale while riding inthe elevator moving withacceleration 2 m/s2 . What isthe reading on the scale?a. 590 Nb. 500 Nc. 490 Nd. zero

378. The BMW Z4 roadster (A brandname of a Car) is rounding aflat, unbanked curve with radiusR .If the coefficient of frictionbetween tires and road is μswhat is the maximum speed

vmax at which the driver cantake the curve without sliding?a. mgRb. μs gRc. √ μs gRd. mR/a

379. Coulomb Force andGravitational force area. short range forcesb. long range forcesc. only gravitational force is

long ranged. range of both forces

depend upon the distance380. Nuclear Strong force and

Nuclear Weak force area. short rangeb. long rangec. only weak force is short

ranged. only strong force is short

range381. Mark with order of decreasing

of strength of four forcesa. Gravitational, nuclear

weak, strong, coulomb.b. strong, electromagnetic,

weak, gravitationalc. strong, electromagnetic,

gravitational, weakd. d. all forces are equal

382. The gravitational potentialenergy varies asa. 1/rb. r2

c. 1/r 2

d. 1/r 3

383. The SHM of a simplependulum vibrates only whenthere isa. applied forceb. periodic forcec. restoring forced. gravitational force

Shah Sab MS GIK Institute, 6-06-2006 42384. The maximum magnitude of

displacement of a simplependulum is calleda. amplitudeb. frequencyc. one cycled. period

385. The maximum speed of a massattached to a spring occurs at x= 0 and given bya. w Ab. √(k/m Ac. 1/2 k Ad. zero

386. The Elastic Potential ismaximum when x= A and givenbya. w A

b. 1/2 k x2

c. 1/2 k A2

d. 1/2 k A387. If the equilibrium position of a

mass attached to a spring is2m. then force acting on themass of 6 kg stretched through10m is given bya. 2kb. 10kc. 12kd. 8ke. (K is a spring constant.)

End