question_answer 5)

When a glass rod is rubbed with a silk cloth, charges appear on both. A similar phenomenon is observed with many other pairs of bodies. Explain how this observation is consistent with the law of conservation of charge. 

Answer:

On rubbing, the electrons are transferred front one body to the other. For example, when glass rod is rubbed with a piece of silk cloth, electrons from the glass rod are transferred to the piece of silk cloth. The glass rod acquires (+) charge whereas the silk cloth gets (–) charge. Silk and glass are neutral before rubbing and after rubbing the total charges on glass as well as silk taken together are once again zero. Similar phenomenon is observed with other pairs ofbodies. Thus, in an isolated system the total charge is neither created nor destroyed, the charge is simply transferred from one body to the other. This observation is consistent with the law of conservation of charges.