Suppose we have two particles …..one is neutral and other is charged (either +ve or -ve )how can we know which particle has neutral charge and which has +ve or -ve charge ….without using third medium …....
Suppose we have two particles …..one is neutral and other is charged (either +ve or -ve )how can we know which particle has neutral charge and which has +ve or -ve charge ….without using third medium …....