Four point charges q, q, q and � q are placed at the vertices of a square of side length a. The
Channel: Doubtnut
Date: 2020-02-17

Four point charges q, q, q and � q are placed at the vertices of a square of side length a. The configuration is changed and the charge are positioned at the vertices of a rhombus of side length a with � q charge at the vertex where angle is `120^(@)`. Find the work done by the external agent in changing the configuration.