P is a point at a distance r from the centre of a spherical shell of mass M and radius a, where r lt a. The gravitational potential at P is

P is a point at a distance r from the centre of a spherical shell of m

1.	P is a point at a distance r from the centre of a spherical shell of mass M and radius a, where r lt a. The gravitational potential at P is
Answer» `-(GM)/(R)` `-(GM)/(a)` `-GM(r)/(a^(2))` `-GM((a-r)/(a^(2)))` ANSWER :B