JEE Main Physics question

Statement 1: The centre of mass of an electron and proton, when released, moves faster towards the proton. Statement 2: This is because proton is heavier.

(A)Assertion is True, Reason is True; Reason is the correct explanation for Assertion
(B)Assertion is True, Reason is True; Reason is NOT the correct explanation for Assertion
(C)Assertion is True, Reason is False
(D)Assertion is False, Reason is TrueCorrect

Answer: (D)

Solution

With only their mutual (internal) electrostatic attraction acting, the electron-proton system has no external force, so its centre of mass does not move at all (it remains stationary, assuming it started

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Question ID VK-158697