The capacity of a spherical conductor in $ MKS$ system is
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(c) The potential is given as, $V=\frac{q}{4 \pi \varepsilon_{0} R}$
The capacitance is given as, $C=\frac{q}{V}$
$=\frac{q}{\frac{q}{4 \pi \varepsilon_{0} R}}$
$=4 \pi \varepsilon_{0} R$
Thus, the capacity of a spherical conductor is $4 \pi \varepsilon_{0} R$
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