Three point charges of occupy three corners of a square of side

PHYSICS · Subjective · CBSE · Physics · Electrostatic Potential and Capacitance · Electrostatic Potential and Capacitance

Problem

Three point charges of

+1.0\,\mu\text{C}

occupy three corners of a square of side

0.30\,\text{m}

. Determine the amount of work that must be done by an external agent to bring a fourth

+1.0\,\mu\text{C}

charge from infinity to the vacant corner of the square. Give your answer in joules.