# From a solid sphere of mass M and radius R, a spherical portion of radius  is removed, as shown in the figure. Takinggravitational potential at  , the potential at the centre of the cavity thus formed is :(G5 gravitational constant) Option 1) Option 2) Option 3) Option 4)

As we learnt in

Potential due to Uniform solid sphere -

Mass of sphere

distance from centre of sphere

- wherein

Outside the surface

on the surface

Inside the surface

Mass of spherical portion to be removed

Potential at point P due to spehrical portion to be removed

Option 1)

This option is incorrect.

Option 2)

This option is correct.

Option 3)

This option is incorrect.

Option 4)

This option is incorrect.

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