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Q.

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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a

−4GmR

b

−2GmR

c

−GmR

d

−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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