Two equal positive charges are separated by a fixed distance.If you put a third positive charge midway between these two charges,its electrical potential energy (relative to infinity)is zero because the electrical forces due to the two fixed charges just balance each other.

Question

Quizplus · Accepted Answer

The electrical potential energy is not zero because potential energy depends on the potential at a point, not the forces. The potential at the midpoint is the sum of potentials due to each charge, which is not zero.

Two Equal Positive Charges Are Separated by a Fixed Distance