A particle of mass m is placed at the centre of a thin spherical shell of mass 2m and radius R. Then the gravitational potential at a distance R2 from the centre of the shell is

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−4GmR

−2GmR

−GmR

−3GmR

answer is A.

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Detailed Solution

(1)V = Potential due to the particle + potential due to the shell.=−GmR/2 + −G.2mR=−4GmR.

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