Physics Questions for Jee Main Aipmt Bitsat 2014

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MCQ’S FOR JEE MAIN/ AIPMT/ BITSAT 1.

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Which of the following is the correct decreasing order of the strengths of four fundamental forces of nature ? (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 force 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 The physical quantities not having same dimensions are (a) torque and work (b) momentum and Planck’s constant (c) stress and Young’s modulus (d) speed and electricaly permittivity 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 density is (a) 4 (b) 2 (c) 1 (d) 6.8 Dimensions of

1 , where symbols have their mo eo

usual meaning, are (a)

[L-1T]

(b) [L-2 T 2 ] (c)

[L2 T -2 ]

(d) [LT -1 ] .

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From a building two balls A and B are thrown such that A is thrown upwards and B downwards (both vertically). If vA and vB are their respective velocities on 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 if its velocity is zero at a given instant of time Reason: A body is momentarily at rest when it reverses 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 the Assertion (c) If Assertion is true, but the Reason is false (d) If Assertion is false and Reason is true

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A body covers 26, 28, 30, 32 meters in 10th, 11th, 12th and 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

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If you were to throw a ball vertically upward with an initial velocity of 50 m/s approximately, how long would 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 A bus starts moving with acceleration 2 m/s2. A cyclist 96 m behind the bus starts simultaneously towards the bus at 20 m/s. After what time will he be able to overtake the bus? (a) 4 sec (b) 8 sec (c) 12 sec (d) 16 sec