Download - Question Bank for Unit 1
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Question 1 Charge on one electron is ___________coulomb
Option A 1.62x10-19
Option B 1.62x1019
Option C 6.24x1018
Option D 6.24x10-19
Option E
Correct Answer A
Explanation(Optional) No Explanation
Difficulties
Sub Topic Elementary concepts
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Question 2 The direction of conventional current is _______________
Option A Opposite to the direction of electrons
Option B Same as the direction of electrons
Option C From negative to positive of battery in external circuit
Option D None of the above
Option E
Correct Answer A
Explanation(Optional)
Difficulties
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Question 3 The rate of flow of charge is __________
Option A Voltage
Option B e.m.f
Option C Current
Option D Electric potential
Option E
Correct Answer C
Explanation
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Question 4 The unit of current is
Option A Newton
Option B Ohms
Option C Coulumbs/sec
Option D Volts
Option E
Correct Answer C
Explanation
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Question 5 The unit of electric potential is
Option A Ohm
Option B Coulomb
Option C Ampere
Option D Volt
Option E
Correct Answer D
Explanation
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Question 7 The reistance of wire is 10.If its length is doubled its resistance will be ________________
Option A 20
Option B 40
Option C 10
Option D 1
Option E
Correct Answer b
Explanation
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Question 6 A material with highest value of resistivity is the best
Option A ConductorOption B SemiconductorOption C InsulatorOption D None of theseOption ECorrect Answer
C
ExplanationDifficultiesSub Topic
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Question 8 Ohms law is applicable when _____________is constant
Option A Voltage
Option B Temperature
Option C Current
Option D power
Option E
Correct Answer B
Explanation
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Question 9 The resistance of the metals increases as the temperature_________
Option A Increases
Option B Decreases
Option C Remains constant
Option D None of these
Option E
Correct Answer A
Explanation
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Question 10 _______________are used to manufacture resistance boxes
Option A Alloys
Option B Semiconductors
Option C Insulators
Option D Metals
Option E
Correct Answer A
Explanation
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Question 11 The unit of R.T.C is
Option A C
Option B C
Option C C
Option D C
Option E
Correct Answer C
Explanation
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Question 12 Semiconductors have __________temperature coefficient of resistivityOption A PositiveOption B NegativeOption C ZeroOption D None of theseOption ECorrect Answer CExplanationDifficultiesSub Topic
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Question 13 A coil has a resistance of 20 at 20C and its R.T.C at 0C is 0.003C then its resistance at 50C
Option A 23
Option B 21.8
Option C 21.698
Option D 218
Option E
Correct Answer C
Explanation
Difficulties
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Question 14 Insulation resistance is the opposition to the ___________
Option A Flow of conventional current
Option B Leakage current
Option C Leakage flux
Option D None of these
Option E
Correct Answer B
Explanation
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Question 15 The path of leakage current through the conductor is _____________
Option A Only on the surface of conductor
Option B Radially inward
Option C Radially outward
Option D None of these
Option E
Correct Answer C
Explanation
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Question 16 If two cables are joined in series ___________
Option A Their conductor resistance are in series while their insulation resistances are in parallel
Option B Their conductor resistance are in parallel while their insulation resistances are in series
Option C Their conductor resistance as well as their insulation resistances are in parallel
Option D Their conductor resistance as well as their insulation resistances are in series
Option E
Correct Answer A
Explanation
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Question 17 The insulation resistance is of the order of ______________
Option A Ohms
Option B Milliohms
Option C Mega ohms
Option D Few hundreds of ohms
Option E
Correct Answer C
Explanation
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Question 18 The S.I system is divided into ___________base units &________Supplementary units
Option A 2,7
Option B 7,2
Option C 7,7
Option D 2,2
Option E
Correct Answer B
Explanation
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Question 19 One joule per second means one
Option A Ampere
Option B Watt
Option C Volt
Option D Newton-meter
Option E
Correct Answer B
Explanation
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Question 20 A 100 w lamp operates for 4 hours per day then its energy consumption per day is_______________
Option A 4 units
Option B 4Wh
Option C 0.4 units
Option D O.4Wh
Option E
Correct Answer C
Explanation
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Question 21 The unit of specific heat capacity is ________________
Option A J-Kg/-K
Option B J-/Kg-K
Option C J-Kg-K
Option D None of these
Option E
Correct Answer B
Explanation
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Question 22 1KWh=_____________________Kcal
Option A 0.24x106
Option B 0.116
Option C 860
Option D 0.86
Option E
Correct Answer C
Explanation
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Question 23 7.2MJ=
Option A 1KWh
Option B 2KWh
Option C 1000Wh
Option D 1Wh
Option E
Correct Answer D
Explanation
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Question 24 The practical unit of electrical energy is _____________Option A KW-hrOption B Watt-hrOption C Watt-secondOption D Joule-secondOption ECorrect Answer AExplanationDifficulties
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Question 25 A 40 kg fuel is burned to produce 1720kcal energy then its calorific value is________________
Option A 180J/Kg
Option B 180KJ/Kg
Option C 43KJ/Kg
Option D 43J/Kg
Option E
Correct Answer B
Explanation
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Question 26 A 60W light bulb is in a socket supplied with 120v.What is the current in the bulb?
Option A 0.50A
Option B 2.0A
Option C 60A
Option D 200A
Option E
Correct Answer A
Explanation
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Question 27 Which is a unit of power?
Option A KWh
Option B W/s
Option C A.
Option D J/s
Option E
Correct Answer D
Explanation
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Question 28 Ohms law is not applicable to
Option A D.C circuits
Option B High currents
Option C Semi-conductors
Option D Small resistors
Option E
Correct Answer C
Explanation
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Question 29 Complete the expression :R2= R1(1+_____________)
Option A0t
Option Btt
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Option Ct/0
Option Dt/t
Option E
Correct Answer A
Explanation
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Question 30 The resistance of the coil increases from50 to 59.6from 20C. If its R.T.Cat20C is 0.0032/C,then its final temperature is ____________C
Option A 80
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Option B 60
Option C 40
Option D 20
Option E
Correct Answer A
Explanation
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Question 31 As temperature increases insulation resistance ______________
Option A Increases
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Option B Decreases
Option C Remain same
Option D None of the same
Option E
Correct Answer B
Explanation
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Question 32 The force exerted on a body rotating at a particular distance of 5cm from the axis is 100 N then the torque acted on that body is _______
Option A 0.5N-m
Option B 5N-cm
Option C 5N-m
Option D 500N-m
Option E
Correct Answer C
Explanation
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Question 33 _________________energy depends upon the position of body
Option A Molecular energy
Option B Potential energy
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Option C Atomic energy
Option D Kinetic energy
Correct Answer B
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Question 34 The quantity of heat gained or lost due to change in temperature is called _______________
Option A Sensible heat
Option B Specific heat
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Option C Latent heat
Option D enthalpy
Option E
Correct Answer A
Explanation
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Question 35 The quantity of heat produced by burning unit mass of the substance is called ______________of the fuel
Option A Calorific value
Option B Specific heat
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Option C Latent heat
Option D enthalpy
Option E
Correct Answer A
Explanation
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Question 36 The meters used to measure the domestic power consumption by the electrical company are__________
Option A Voltmeters
Option B Wattmeter’s
Option C Energy meters
Option D ammeters
Option E
Correct Answer C
Explanation
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Question 37 The water pump used to lift the water converts ___________energy into___________energy
Option A Mechanical, electrical
Option B hydraulic, electrical
Option C electrical ,Mechanical
Option D Electrical,thermal
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Option E
Correct Answer C
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Question 38 A wire carries a current of 5 A for 10 seconds to generate the heat of 500 joules then the resistance of the wire is ______________
Option A 1
Option B 0.5
Option C 5
Option D 2
Option E
Correct Answer D
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Explanation
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Question 39 A cable has conductor diameter of 5cm and thickness of the insulation is 2cm.if the resistivity of insulation is 6x1010-mthen the insulation resistance of 250m cable is approximately ______________M
Option A 22.45
Option B 12.85
Option C 32.75
Option D 100.25
Option E
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Correct Answer A
Explanation
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Question 40 In case of liquids ,ohms law is
Option A Fully obeyed
Option B Partially obeyed
Option C There is no relation between current & potential difference
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Option D None of the above
Option E
Correct Answer A
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Question 41 Insulators have __________temperature co-efficient of resistance
`Option A Zero
Option B Positive
Option C Negative
Option D None of the above
Option E
Correct Answer C
Explanation
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Question 42 Eureka has______________ temperature coefficient of resistance
Option A Almost zero
Option B Negative
Option C Positive
Option D None of the above
Option E
Correct Answer A
Explanation
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Question 43 A wire has a resistance of 10Ω.It is stretched by one tenth of its original length. then its resistance will be
Option A 10Ω
Option B 12.1Ω
Option C 9Ω
Option D 11Ω
Option E
Correct Answer B
Explanation
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Question 44 A tap supplies water at 22°C.A man takes 1 litre of water per minute at 37°C from the geyser. the power of geyser is
Option A 1050W
Option B 1575W
Option C 525W
Option D 2100W
Option E
Correct Answer A
Explanation
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Question 45 If the current in electric bulb drops by 2% then power decreases by ________%
Option A 1
Option B 2
Option C 4
Option D 16
Option E
Correct Answer C
Explanation
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Question 46 The quantity of heat required to change the state of the substance without change in temperature is called ____________
Option A Sensible heat
Option B Specific heat
Option C Latent heat
Option D enthalpy
Option E
Correct Answer C
Explanation
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Question 47 Which of the following is not same as watt?joule/sec
Option A Amperes/volt
Option B Amperes/volts
Option C Amperes2 Xohm
Option D
Option E Xohm
Correct Answer B
Explanation
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Question 48 Ohms law is not applicable to
Option A Dc circuits
Option B High currents
Option C Semi-conductors
Option D Small resistors
Option E
Correct Answer C
Explanation
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Question 49 A wire carries a current of 5A for 10 sec to generate the heat of 500 joules then the resistance of the wire is ________Ω
Option A 1
Option B 0.5
Option C 5
Option D 2
Option E
Correct Answer D
Explanation
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Question 50 ___________________is the energy possessed by the body due to its motion
Option A Molecular energy
Option B Potential energy
Option C Atomic energy
Option D Kinetic energy
Option E
Correct Answer D
Explanation
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