A charge Q exerts a 1.2 N force on another charge q. If the distance between the charges is doubled, what is the magnitude of the force exerted on Q by q?

Question

Quizplus · Accepted Answer

According to Coulomb's law, the force between two charges is inversely proportional to the square of the distance between them. If the distance is doubled, the force becomes (1/2^2) = 1/4 of the original force. Therefore, the new force is 1.2 N / 4 = 0.30 N.

A Charge Q Exerts a 1