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Physics MCQs for NEET — Practice Questions with Answers

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(ASSERTION & REASON) Assertion and Reason are given in following questions. Each question have four option. One of them is correct it. Assertion : Work done by centripetal force is zero. Reason : This is because entripetal force is always along the tangent

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Explanation

The assertion that the work done by centripetal force is zero is correct because centripetal force acts perpendicular to the direction of displacement, which means no work is done (work done = force × displacement × cos(θ), and θ = 90°). However, the reason provided is incorrect because centripetal force is not along the tangent but rather directed towards the center of the circular path. Hence, the assertion is true, but the reason is false.

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(ASSERTION & REASON) Assertion and Reason are given in following questions. Each question have four option. One of them is correct it. Assertion : Two bodies of different masses have same momentum. Their kinetic energy are in the inverse ratio of their masses. Reason : K.E. = $ { 1 \over 2} mv^2 $

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(ASSERTION & REASON) Assertion and Reason are given in following questions. Each question have four option. One of them is correct it. Assertion : Linear momentum is conserved in both, elastic and inelastic collisions. Reason : Total energy is conserved in all such collisins.

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Explanation

The assertion is that linear momentum is conserved in both elastic and inelastic collisions, which is true. The reason states that total energy is conserved in all such collisions. While energy conservation is true in elastic collisions, in inelastic collisions, only the total energy (kinetic energy + potential energy) is conserved, not just kinetic energy. Therefore, while both the assertion and reason are true, the reason does not correctly explain the assertion.

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(ASSERTION & REASON) Assertion and Reason are given in following questions. Each question have four option. One of them is correct it. Assertion : Both, a stretched spring and a compressed spring have potential energy. Reason : Work is done against the restoring force in each case.

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Explanation

The assertion says that both a stretched spring and a compressed spring have potential energy, which is true. The reason is that work is done against the restoring force in each case, which is also true. When a spring is either stretched or compressed, work is done against the spring's restoring force, storing potential energy in the spring. Therefore, the reason correctly explains the assertion.

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A force F = kx (where k is positive constant) is acting on a particle. Match column-I and column-II, regarding work done in displacing the particle. Column - I (a)From x = -4 to x = -2 (b)From x = -2 to x = -4 (c)From x = -2 to x = +2 Column - II (P) Positive (Q) zero (R) negative

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A body falls freely under the action of gravity from a height h above the ground. Column - I (a) P.E. = 2(K.E.) (b) P.E. = K.E. (c) P.E. = 2 (K.E.) (d) P.E.+ K.E. Column - II (P) constant at every point (Q) at height h/3 (R) at height 2h/3
(S) at height h/2

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Two vehicles moving on a horizontal road are stopped by same retarding force. Column - I (a) When they have same K.E. (b) When they have different masses but same velocity (c) When both have same momentum (d) When both have same mass but different velocities Column - II (P) faster body stop in larger distance (Q) larger body stops in larger distance. (R) heavier body stops in larger distance. (S) stopped in same distance.

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Pure silicon doped with phosphorous is a

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Explanation

excess of one valence electron in P atom over Si will form n type conductor.

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Which of tbc following is semiconductor ?

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Photo electric effect is maximum in ...

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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.