A ring of radius a, made of a nonconducting material, holds a positive charge +q on its bottom half and a negative charge -q on its top half. The electric potential at the center of the ring is

Question

Quizplus · Accepted Answer

The electric potential due to a positive charge is positive, and due to a negative charge is negative. Since the charges are equal in magnitude but opposite in sign and symmetrically placed, their potentials at the center of the ring will cancel each other out, resulting in a net potential of 0 V.

A Ring of Radius A, Made of a Nonconducting Material