A particle of mass m is located inside a spherical shell of mass M and radius R. The gravitational force of attraction between them is
A
GMmR
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B
GMmR2
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C
−GMmR2
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D
0
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Solution
The correct option is D 0 If a point mass is placed inside a uniform spherical shell, the gravitational force on the point mass is zero. Hence, the gravitational force exerted by the shell on the point mass and the force of attraction between them is zero.