Conservation of charge:The net charge of an isolated system remains constant.Charge can be created and destroyed, but only in positive-negative pairs.
It is not possible to destroy or create charge.
You can cancel out the e ect of a charge(or neutralize the charge on the body) on a body by adding an equal and opposite charge to it, but you can't destroy the charge itself.
The following example makes this clear
If a glass rod is rubbed with a silk cloth, due to friction the glass gets charged positively and the silk negatively.The charging is basically due to the transfer of negative charge(electrons) from the glass to the silk.This experiment suggests that:- Charge is transfered but not created or destroyed.
The total charge on the Glass silk cloth system remains the same i.e zero before rubbing and after rubbing.
This will be continued in next day.
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