Question
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
-
-3 GM/ a
-
-2 GM/a
-
-GM/a
-
-4 GM /a
Solution
A.
-3 GM/ a
= - GM/a - GM2/a
= -3GM/a
