Question

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

Answer 1

Two diagonally opposite points on a square are equidistant from the center of square where the source charge 500 µC is located. Hence the potential on the two points is the same.

∴ Work done in moving q₀ = 10 µC from one point to another is

W = q₀(V - V) = 0