A charge `Q_1` exerts some force on a second charge `Q_2`. If a 3rd charge `Q_3` is brought near, the force of `Q_1` exerted on `Q_2` :-

Options

A. decreases
B. increases
C. remains unchanged
D. increases if `q_3` is of the same sign as `q_1` and decreases if `q_3` is of opposite sign

Answer

C