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Q.

A charge of 10−9C is placed on each of the 64 identical drops of radius 2 cm. They are then combined to form a bigger drop. Find its potential

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a

7.2×103 V

b

7.2×102 V

c

1.44×102 V

d

1.44×103 V

answer is A.

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Detailed Solution

V=n2/3v⇒V=(64)2/3×9×109×10−92×10−2        =7.2×103V
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