A point mass m is placed inside a spherical shell of radius R and mass M at a distance $\frac{R}{2}$ from the centre of the shell. The gravitational force exerted by the shell on the point mass is

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zero

$\frac{GMm}{R^{2}}$

$\frac{GMM}{R^{2}}$

$\frac{2 GMm}{R^{2}}$

answer is C.

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Detailed Solution

If a point mass is placed inside a uniform spherical shell, the gravitational force on the point mass is zero. Hence, inside the shell there is no field

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