From a solid sphere of mass M and radius R, a spherical portion of radius `( R)/(2)` is removed, as shown in the figure. Taking gravitational potential V=0 at r=`oo`, the potential at the centre of the cavity thus formed is (G=gravitational constant )
A
`-(GM)/(R)`
B
`-(2GM)/(3R)`
C
`-(2GM)/(R)`
D
`(-GM)/(2R)`
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The correct Answer is:
A
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