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Q.

A particle of mass M is at a distance ‘R’ from the surface of a thin spherical shell of mass M uniformly distributed over its surface, R is the radius of the shell. Now select the correct option.

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a

Gravitational potential at the centre is zero but gravitational field is not zero.

b

At any point inside the shell only gravitational field is zero. 

c

Neither gravitational field nor gravitational potential is zero inside the shell.

d

Gravitational field and potential both are zero at the centre of the shell. 

answer is D.

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Detailed Solution

Gravitational field inside the shell is not zero and produced by point mass M only. Where as  gravitational potential inside the shell is produced by the shell as well as by the particle.

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