Two equal point charges are fixed at `x=-a` and `x=+a` on the x-axis. Another point charge
Channel: Doubtnut
Date: 2020-07-05

Two equal point charges are fixed at `x=-a` and `x=+a` on the x-axis. Another point charge Q is placed at the origin. The change in the electrical potential energy of Q, when it is displaced by a small distance x along the x-axis, is approximately proportional to