Q 11-07-092JEE MainJEE Main 2023 (13 Apr, Shift 2)Easy
Two planets A and B of radii $R$ and $1.5R$ have densities $\rho$ and $\dfrac\rho2$ respectively. The ratio of acceleration due to gravity at the surface of B to A is
Answer: (C) $3:4$
$g=\dfrac43\pi G\rho R\propto\rho R$. $\dfrac{g_B}{g_A}=\dfrac12\times1.5=\dfrac34$.
Solution by Sreeraj P, M.Sc Physics