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A very thin spherical shell of radius R ...

A very thin spherical shell of radius R and mass m comprises of dust particles uniformly distributed along its surface. A particle of mass m is placed at the centre of the shell and its radius is reduced to R/2. Then work done by gravitational force is

A

`(Gm^2)/2R`

B

`(3Gm^2)/(2R)`

C

`(5Gm^2)/(4R)`

D

`(-3Gm^2)/(4R)`

Text Solution

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The correct Answer is:
B
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