Question

A particle of mass M is situated at the centre of a spherical shell of same mass and radius R. The gravitational potential at a point situated at $\frac { \mathrm { R } } { 2 }$ distance from the centre will be

• A.
• B.
• C.
• D.

Answer 1

Answer: (A)

Answer 2

Here, mass of the particle = M

Mass of the spherical shell = M

Radius of the spherical shell = R

Let O be centre of spherical shell. Gravitational potential at point P due to particle at O is

Gravitational potential at point P due to spherical shell is