The charge given to a hollow sphere of radius $10\, cm$ is $3.2×10^{-19}\, coulomb$. At a distance of $4\, cm$ from its centre, the electric potential will be
A$28.8 \times {10^{ - 9}}\,volts$
B$288\,volts$
C$2.88\, volts$
D$Zero$
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A$28.8 \times {10^{ - 9}}\,volts$
a (a) Potential is to be determined at a distance of $4\, cm$ from centre of sphere i.e. inside the sphere.
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