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
(1) Is least along the path AB
(2) Is least along the path AD
(3) Is zero along all the paths AB, AC, AD and AE
(4) Is least along AE
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(3) ABCDE is an equipotential surface, on equipotential surface no work is done in shifting a charge from one place to another.