A uniform spherical shell gradually shrinks maintaining its shape. The gravitational potential at the centre 

(a) increases 

(b) decreases 

(c) remains constant 

(d) oscillates.

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1 Answers

(b) Decreases

EXPLANATION:

Gravitational potential at the centre of spherical shell =−GM/R
As, the shell is shrinking,R decreases,GM/R increases.
so,−GM/R  decreases.

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