Q. $P$ is a point at a distance $r$ from the centre of a solid sphere of radius $R_{0}$. The gravitational potential at $P$ is $V$. If $V$ is plotted as a function of $r$, then the curve representing the plot correctly is:

Gravitation Report Error

A

24%

B

8%

C

30%

D

37%

Solution:

Gravitational potential at a distance $r$ outside a uniformly charged solid sphere varies inversely with $r$ and inside it is given by the expression $\left(K Q / 2 R^{3}\right)\left(3 R^{2}-r^{2}\right)$ hence option (D) is correct.

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