$1000$ small water drops each of capacitance $C$ join together to form one large spherical drop. The capacitance of bigger sphere is ......... $C$
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(b)
$C=4 \pi \varepsilon_0 r$
$1000 \cdot \frac{4}{3} \pi r^3=\frac{4}{3} \pi R^3$
$R=10 r$
$C^{\prime}=4 \pi \varepsilon_0 R=10\left(4 \pi \varepsilon_0 r\right)$
$C^{\prime}=10 C$
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