Figure shows some equipotential lines distributed in space. A charged object is moved from point `A` to point `B`.

Options

A. The work done in Fig. (i) is the greatest
B. The work done in Fig. (ii) is least
C. The work done is the same in Fig. (i), Fig. (ii) and Fig. (iii)
D. The work done in Fig. (iii) is greater than Fig. (ii) but equal to that in Fig. (i)

Answer

C

Explanation

The work done by a electrostatic force is given by `W_(12) = q(V_(2) - V_(1))`. Here initial and final potentials are same in all three case ans same charge is moved, so work done is same in all three cases.