Question

How do charges interact ? On rubbing a glass rod with silk cloth, what type of charge is generated in (a) silk cloth (b) glass rod. Why does a rubbed comb attract bits of paper?

Answer 1

Here given three questions in those questions we have to answer all of them. In the first one we have to discuss how the charges interact. In the second one we have to prove what type of charge is generated in given data. In the third one we discussed the rubbed comb on a piece of paper. For these questions we are going to discuss them in depth.

Complete step by step answer:
Charges interact: If there are like charges then they repel each other, if there are unlike charges then they attract each other. If the directions are positive and negative then they repel each other.

Rubbing a glass rod with silk cloth then negative charge is generated.Rubbing a glass rod with a glass rod then positive charge is generated. Here the glass rod is rubbed by a glass rod so that a positive charge is generated. In the above theory, a glass rod is rubbed by a silk cloth so that a negative charge is generated.

Usually comb attracts paper; because it has some energy transferred to the paper. The paper pieces have a positive charge which attracts the comb. While a comb attracts paper pieces then some excess of negative charge is released from the comb to the paper.

Note: We have discussed how the charges interact as they repel with each other and attract each other when they have like and unlike charges. Silk cloth has negative charge whereas glass rod has positive charge. Comb releases some negative energy to the paper pieces which release from the comb.