When a glass rod is rubbed with silk, the rod acquires one kind of charge while the silk
acquires the second kind of charge. This is true for any pair of objects that are rubbed to get
them electrified. Now if the electrified glass rod is put in contact with silk, (with which it was
rubbed), the two no longer attract each other. They also do not attract or repel other light
objects as they did on being electrified.
Thus, the charges acquired after rubbing are lost when the charge bodies are brought in
contact. What can one conclude from these observations?
Both glass rod and plastic ruler in the experiments above were insulators
Do you think it is only possible to charge an insulator what about other materials?
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