Question

A 500 µC charge is at the centre of a square of side 10 cm. Find the work done in moving a charge of 10 µC between two diagonally opposite points on the square.

Answer 1

The points A and B are equidistant from the centre of square where charge q = 500 µC is located; therefore, points A and B are at the same potential i.e., V_A = V_B.

∴ Work done in moving charge q₀=10 µC from A to B is

W = q₀ (V_B – V_A) = 0