question_answer

The system of three charges is shown in figure. If charge B is displaced slightly towards A, then:

A)  it will displace more towards A

B)  it will displace towards C

C)  its path will be parabolic

D)  its motion will be SHM

Correct Answer: D

Solution :

Since, three charges are positive and equal in magnitude so, balanced system of forces acting on them will be according to figure. So, equal forces will act on them. If charge B is displaced towards A, then it will be repelled by same force and displaced towards C by the same distance. Again it will be repelled by same force from C and displaced towards A. Hence, the motion of charge will be SHM.