For a charge Q1, the effect of charge Q2 on Q1 will be,

A)
F1 = F2
B)
F1 = -F2
C)
F1 = F2 = 0
D)
F1 and F2 are not equal

Correct Answer : Option (B) :   F1 = -F2


Explanation : The force of two charges with respect with each other is given by F1 and F2. Thus F1 + F2 = 0 and F1 = -F2.