Q 11-07-089JEE MainJEE Main 2023 (25 Jan, Shift 1)Easy
$T$ is the time period of simple pendulum on the earth's surface. Its time period becomes $xT$ when taken to a height $R$ (equal to earth's radius) above the earth's surface. Then, the value of $x$ will be
Answer: (B) 2
At height $R$: $g'=\dfrac{g}{4}$. $T\propto\dfrac1{\sqrt g}$, so the period doubles: $x=2$.
Solution by Sreeraj P, M.Sc Physics