Question

Two planets are of the same material but their radii are in the ratio `2:1`. Then ratio of accelerations due to gravity on those two planets is
A. `2:1`
B. `1:2`
C. `4:1`
D. `1:4`

Answer 1

Correct Answer - a
`(g_(1))/(g_(2))=(rho_(1))/(rho_(2))xx(R_(1))/(R_(2))=1xx(2)/(1)=(2)/(1).`