physics questions for jee main aipmt bitsat 2014

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 1 ĹŘŏ řŐ ŞŒŏ ŖŏŋŎœŘő ŚşŌŖœŝŒŏŜŝ œŘ ijŘŎœŋĖ ĮœŝŒŋ ĺşŌŖœōŋŞœřŘ ŚŜřŠœŎŏŝ Ōřřŕŝ ŋŘŎ ŝŞşŎţ ŗŋŞŏŜœŋŖŝ ŐřŜ ŝōŒřřŖŝ ŋŘŎ ŠŋŜœřşŝ ōřŗŚŏޜޜŠŏ ŏŢŋŗŝ ŌŏœŘő ōřŘŞœŘşřşŝŖ ţ ŒŏŖŎ ŋōŜřŝŝ ŞŒŏ ōřşŘŞŜţ Ę ĮœŝŒŋđŝ ŝřŖŏ ŚşŜŚřŝŏ œŝ Şř ŏŘōřşŜ ŋőŏ ŋ ŝŞşŎŏŘŞ Şř őŏŞ ŞŒŏ ŌŏŝŞ řşŞ řŐ ŚŜŏŚŋŜ ŋŞœřŘĘ ĮœŝŒŋ ĺşŌŖœōŋ ŞœřŘ řŐŐŏŜŝ ŋŘ řŘŖœŘŏ ŌřřŕŝŞřŜŏ Şř ŒŏŖŚ ŝŞşŎŏŘŞŝ Ōşţ ŏŢŋŗŌřřŕŝ řŘŖœŘŏ šœŞŒ ŏŋŝŏĘ ŁŏĖ ŋŞ ĮœŝŒŋ ŚŜřŠœŎŏ ŋ šœŎŏ ŋŜŜŋţ řŐ ĬŋŘŕ įŢŋŗŌřřŕŝ Şř ŒŏŖŚ ŋŖŖ ŞŒřŝŏ ŋŝŚœŜŋŘŞŝ šŒř šœŝŒ Şř ōŜŋōŕ ŞŒŏœŜ ŜŏŝŚŏōŞœŠŏ ŎœŐŐŏŜŏŘŞ ŖŏŠŏŖŝ řŐ ŌŋŘŕ ŏŢŋŗŝĘ īŞ ĮœŝŒŋ ĺşŌŖœōŋŞ œřŘĖ šŏ ŝŞŜœŠŏ Şř ŌŜœŘő řşŞ ŞŒŏ ŌŏŝŞ őşœŎŏŌřřŕŝ ŞŒŋŞ ŝŞşŎŏŘŞŝ šřşŖŎ ŐœŘŎ Şř Ōŏ ŞŒŏ ŗřŝŞ şŝŏŐşŖ ŐřŜ ĬŋŘŕ ĺŜřŌŋŞœřŘŋŜţ ŏŢŋŗŝĘ  ABOUT DIS HA PUBLICA TION 1. Which of the following is the correct decreasing order of the strengths of four fundamental forces of nature ? (a ) Elec tromagne tic f orce > we ak nucle ar f orce > gravitational force > strong nucl  ear force (b ) Strong nuclea r fo rce > weak nuclea r fo rce > electromagnetic force > gravitational fo rce (c ) Gra vit atio nal for ce > elec tromagnetic forc e > strong nuclear force > weak nuclear force (d) Strong nuclear f orce > electro magnetic forc e > weak nuclear force > gravitational force 2. The respective number of significant figures for the number 23.023, 0.0003 and 2.1 × 10  –3  are respectively . ( a) 5, 1 and 2 (b) 5, 1 and 5 (c) 5, 5 and 2 (d) 4, 4 and 2 3. The physical quantities not having same dimensions are ( a) to rque and work (b ) momentum and Planc k’ s cons tant (c ) stre ss a nd Y oung’ s mo dulu s (d ) spe ed and el ec tric aly per mitt ivi ty 4. A wire of length l = 6 ± 0.06 cm and radius r = 0. 5 ± 0.005 cm and mass m = 0.3 ± 0.003 gm. Maximum  percentage error in den sity is ( a) 4 (b) 2 (c) 1 (d) 6.8 5. Dimensions of o o 1 e m  , where symbols have their usual mea ning, are (a) ] T L [ 1 - (b) ] T L [ 2 2 - (c) ] T L [ 2 2  - (d) ] LT [ 1 - . MCQ’S FOR JEE MAIN/ AIPMT/ BITSAT 6. From a building two balls  A and B are thrown such that  A is thrown upwards and B downwards (both vertically). If v A  and v B  are their respective velo cities on reaching the ground, then ( a) v A  > v B (b) v A  = v B (c ) v A  < v B (d ) thei r velo citi es de pend on their mas ses. 7.  Assertion: A body can h ave an accelera tion even if its velocity is zero at a given in stant of time  Reason: A body is momentarily at rest when it reverses its direction of motion. ( a) If b oth As se rtion and Re aso n are true and t he Reason is correct explanation of the Assertion (b ) If bot h Asse rtion and R easo n are true, b ut Reason is not correct explanation of the Assertion (c ) If As se rtion is true, bu t the Re aso n is fals e (d ) If As se rtio n is fals e and Re aso n is true

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  • 1One of the leading publishers in India, Disha Publication provides books and study materials for schools and various

    competitive exams being continuously held across the country. Disha's sole purpose is to encourage a student to get the

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    ABOUT DISHA PUBLICATION

    1. Which of the following is the correct decreasingorder of the strengths of four fundamental forces ofnature ?(a) Electromagnetic force > weak nuclear force >

    gravitational force > strong nuclear force(b) Strong nuclear force > weak nuclear force >

    electromagnetic force > gravitational force(c) Gravitational force > electromagnetic force >

    strong nuclear force > weak nuclear force(d) Strong nuclear force > electromagnetic force >

    weak nuclear force > gravitational force2. The respective number of significant figures for the

    number 23.023, 0.0003 and 2.1 103 are respectively.(a) 5, 1 and 2(b) 5, 1 and 5(c) 5, 5 and 2(d) 4, 4 and 2

    3. The physical quantities not having same dimensionsare(a) torque and work(b) momentum and Plancks constant(c) stress and Youngs modulus(d) speed and electricaly permittivity

    4. A wire of length l = 6 0.06 cm and radius r = 0.5 0.005 cm and mass m = 0.3 0.003 gm. Maximumpercentage error in density is(a) 4(b) 2(c) 1(d) 6.8

    5. Dimensions of oo

    1em

    , where symbols have their

    usual meaning, are

    (a) ]TL[ 1-

    (b) ]TL[ 22-

    (c) ]TL[ 22 -

    (d) ]LT[ 1- .

    MCQS FOR JEE MAIN/ AIPMT/ BITSAT

    6. From a building two balls A and B are thrown suchthat A is thrown upwards and B downwards (bothvertically). If vA and vB are their respective velocitieson reaching the ground, then(a) vA > vB(b) vA = vB(c) vA < vB(d) their velocities depend on their masses.

    7. Assertion: A body can have an acceleration even ifits velocity is zero at a given instant of timeReason: A body is momentarily at rest when itreverses its direction of motion.(a) If both Assertion and Reason are true and the

    Reason is correct explanation of the Assertion(b) If both Assertion and Reason are true, but

    Reason is not correct explanation of theAssertion

    (c) If Assertion is true, but the Reason is false(d) If Assertion is false and Reason is true

  • 28. A body covers 26, 28, 30, 32 meters in 10th, 11th, 12thand 13th seconds respectively. The body starts(a) from rest and moves with non-uniform

    acceleration(b) from rest and moves with uniform acceleration(c) with an initial velocity 7 m/s and with uniform

    acceleration 2m/s2(d) with an initial velocity 2 m/s and with uniform

    acceleration 7 m/s2

    9. If you were to throw a ball vertically upward with aninitial velocity of 50 m/s approximately, how longwould it take for the ball to return to your hand?Assume air resistance is negligible.(a) 2.5 s (b) 5.0 s(c) 7.5 s (d) 10 s

    10. A bus starts moving with acceleration 2 m/s2. A cyclist96 m behind the bus starts simultaneously towardsthe bus at 20 m/s. After what time will he be able toovertake the bus?(a) 4 sec (b) 8 sec(c) 12 sec (d) 16 sec