MHT CET 2025 Physics question

A uniform solid sphere of mass 'm' and radius 'r' is surrounded by a uniform thin spherical shell of radius '2r' and mass 'm' then the gravitational field

(A)at a distance of 15 r from the centre is
(B)at a distance of (2.5) r from the centre is Correct
(C)at a distance of (1.5) r from the centre is zero.
(D)between the sphere and spherical shell is uniform.

Answer: (B)

Solution

Outside both bodies () the field is that of the total mass at the centre: . At : , so (B) is true. (A) At , (that value belongs

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Question ID VK-102487