Q. A particle of mass $M$ is situated at the centre of a spherical shell of same mass and radius $a$. The magnitude of the gravitational potential at a point situated at $a/2$ distance from the centre, will be
A) $\frac{4GM}{a}$
B) $\frac{GM}{a}$
C) $\frac{2GM}{a}$
D) $\frac{3GM}{a}$
Explanation
(d) [image:8_image78.emf]
$V_{p} = V_{sphere} + V_{partical}$
$= \frac{GM}{a} + \frac{GM}{a/2} = \frac{3GM}{a}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.