The gravitational potential of two homogeneous spherical shells A and B of same surface density at their respective centres are in the ratio 3 : 4 If the shells coalesce into single one such that surface density remains same, then the ratio of potential at an internal point of the new shell to that of shell A is equal to

Q: The gravitational potential of two homogeneous spherical shells A and B of same surface density at their respective centres are in the ratio 3 : 4 . If the shells coalesce into single one such that surface density remains same, then the ratio of potential at an internal point of the new shell to that of shell A is equal to

(a) 3/2

(b) 5/3

(c) 4/3

(d) 5/7

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Ans: (b)