JEE Main 2025 — Oscillations Question with Solution
JEE Main 2025 (22 Jan Shift 2)
Question
Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : A simple pendulum is taken to a planet of mass and radius, 4 times and 2 times, respectively, than the Earth. The time period of the pendulum remains same on earth and the planet.
Reason (R): The mass of the pendulum remains unchanged at Earth and the other planet.
In the light of the above statements, choose the correct answer from the options given below :
Choose an option
Show full solutionCorrect option: D
Correct answer
DBoth (A) and (R) are true but (R) is NOT the correct explanation of (A)
Step-by-step explanation
$\begin{aligned}
& g=\frac{G M}{R^2} \\
& g^{\prime}=\frac{G(4 M)}{(2 R)^2}=g
\end{aligned}$
A is correct, is correct ; but since doesn't depend on mass ; R doesn't explain A .
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