Eight point charges of magnitude are arranged at the corners of a cube of side
PHYSICS · Subjective · CBSE · Physics · Electrostatic Potential and Capacitance · Electrostatic Potential and Capacitance
Problem
Eight point charges of magnitude q are arranged at the corners of a cube of side l. The arrangement is such that the nearest neighbour of any charge has the opposite sign. Initially, the charges are held at rest. If the system is allowed to move freely, what happens to the arrangement? Does the cube shrink or expand? Calculate the velocity of each charge when the side length of the cube changes from l to nl. Assume that the mass of each point charge is m.