Four point charges Q of equal magnitude and sign are arranged on three of the corners of the square of side d as shown in the figure Which one of the arrows shown represents the net force acting on the charge at the upper right hand corner of the square?

Question

Quizplus · Accepted Answer

The net force acting on the charge at the upper right hand corner of the square will be in the direction of the diagonal passing through it. Therefore, only arrow D represents the net force acting on the charge. Arrows A, B, and C represent forces acting in different directions and cannot be added up to represent the net force.

Four Point Charges Q of Equal Magnitude and Sign Are