Question

A point charge +q is placed midway between two point charges +3q and –q separated by a distance 2d. If Coulomb’s constant is k, the magnitude of the force on the charge +q is:

Answer 1

The correct option is: (B)

Explanation:

The distance between the +q charge and each charge is d. The force on the +q charge from each charge is in the same direction, making the net force kq²/d² + k(3q²)/d²