A point charge Q is located a short distance from a point charge 3Q, and no other charges are present. If the electrical force on Q is F, what is the electrical force on 3Q?

Question

Quizplus · Accepted Answer

The force between two charges depends on the magnitudes of the charges and the distance between them. Since the distance between the two charges in this scenario does not change, the forces on Q and 3Q must be equal in magnitude but opposite in direction, according to Newton's third law. Therefore, the force on 3Q must also be F.

A Point Charge Q Is Located a Short Distance from a Point