Physics Questions for Jee Main Aipmt Bitsat 2014

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Transcript of Physics Questions for Jee Main Aipmt Bitsat 2014

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

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    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