Same equipotential lines distributed in space are shown below. A charged object moves from A to B:

Options

A. Work done is same in fig (I), (II) and (III)
B. Work done is greatest in fig (I)
C. Work done is least in fig (II)
D. Work done in fig (III) is greater then fig (II) but equal to that in fig (I)

Answer

A

Explanation

Work done is given by
`W_(12) = q(V_(2) - V_(1))`
Hence, the initial and final potential is same in all the figures.