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A charge of 10-9 C 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.

a
7.2 x 103 V
b
7.2 x 102 V
c
1.44 x 102 V
d
1.44 x 103 V

detailed solution

Correct option is A

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

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Similar Questions

Two spherical shells are as shown in figure.

Let r be the distance of a point from their common centre.  Then, match the following columns and mark the correct choice from the given codes.

 Column-I Column-II
i.Electric field for r < R1p.is constant for q2 and vary for q1
ii.Electric potential for r < R1q.is zero for q2 and vary for q1
iii.Electric potential for R1 < r <R2r.is constant
iv.Electric field for R1 < r <R2s.is zero

Codes:


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