Given below are two statements: one is labelled as Assertion A and… | JEE Main 2023 (24 Jan, Shift 2)

Q54JEE Main 2023 · 24 JAN · SHIFT 2Easy

Acceleration Due to Gravity

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: A pendulum clock when taken to Mount Everest becomes fast.

Reason R: The value of g (acceleration due to gravity) is less at Mount Everest than its value on the surface of earth.

In the light of the above statements, choose the most appropriate answer from the options given below

Show answer and solution

Answer: (d)

R is correct: $g$ decreases with height, so $g$ is smaller on Mount Everest.
A is wrong: $T = 2\pi\sqrt{L/g}$ , so smaller $g$ gives a longer period and the clock runs slow, not fast.
So the answer is (d) A is not correct but R is correct.

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