First slide

Equipotential surfaces

Question

In the electric field of a point charge q, a certain charge is carried from point A to B, C, D and E. Then the work done

Moderate

A

is least along the path AB
B

is least along the path AD
C

is zero along all the paths AB, AC, AD and AE
D

is least along AE

Solution

ABCDE is an equipotential surface. On equipotential surface no work is done in shifting a charge from one place to another.

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