Question

A point charge $q_1 = 4q_0$ is placed at origin. Another point charge $q_2 = –q_0$ is placed at $x = 12\text{ cm}$. Charge of proton is q0. The proton is placed on x axis so that the electrostatic force on the proton is zero. In this situation, the position of the proton from the origin is _____ cm.

Answer 1

The correct answer is 24