Four point charges are fixed at the corners of a square of side length
PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
Four point charges are fixed at the corners of a square of side length a. Beginning at one corner and proceeding counter-clockwise, the charges are +q, −q, +q, and −q. Determine the total electric potential energy of this configuration in terms of k, q, and a.