A uniform metal sphere of radius a and mass M is surrounded by a thin uniform spherical shell of equal mass and redius 4a. The centre of the shell falls on the surface of the iner sphere

Options

A. The gravitational field intensity at `P_(1)` is `(GM)/(16a^(2))`
B. The gravitational field intensity at `P_(2)` is `(61GM)/(900a^(2))`
C. The gravitational potential at `P_(1)=0`
D. The gravitational potential at `P_(2)=0`

Answer

A, B