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Questions  

The shows two parallel equipotential surfaces A and B at same potential kept at a distance ; apart from each other. A point charge -q is taken from surface A to B, the amount of net work done W will be :

a
-14πε0qr
b
14πε0qr2
c
-14πε0qr3
d
Zero

detailed solution

Correct option is D

W = q ∆v = 0

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