A non-conducting sphere carries a charge uniformly throughout its volume of potential at the surface of the sphere is 10 volt, potential at its centre will be
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a
zero
b
5 volt
c
7.5 V
d
15 V
answer is D.
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Detailed Solution
Potential at a radial distance r (r≤R) is , V=Vs2(3-r2R2) At the centre, r=0, ∴V=32Vs=32×10V=15V.