question_answer

A particle of mass M is situated at the centre of a spherical shell of same mass and radius a. The gravitational potential at a point situated at \[a/2\]distance from the centre, will be [AIPMT (S) 2010]

A) \[-\frac{3GM}{a}\]

B) \[-\frac{2GM}{a}\]

C) \[-\frac{GM}{a}\]

D) \[-\frac{4GM}{a}\]

Correct Answer: A

Solution :

Gravitational potential at point  distance from centre