Sixty four conducting drops each of radius \( 0.02 \mathrm{~m} \) and each carrying a charge of ...

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Sixty four conducting drops each of radius \( 0.02 \mathrm{~m} \) and each carrying a charge of \( 5 \mu \mathrm{C} \) are combined to form a bigger drop. The ratio of surface density of bigger drop to the smaller drop will be
(a) \( 1: 4 \)
(b) \( 4: 1 \)
(c) \( 1: 8 \)
(d) \( 8: 1 \)
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