Question

Tiny bits of paper get attracted to a plastic comb or ruler which have been recently rubbed. We all know that this is due to electrostatic force. But the question is, how does this force generate?

If this is due to rubbing, when we rub our hands then try so it will not get attracted. If it is due to plastic, then other plastic things should also attract paper.

Think and Answer. ​

Answer 1

Answer: No,it is not due to rubbing of our hands.

It is due to electrostatic force in which the uncharged body attract the another uncharged or charged body and this force is generated.

In this case, The plastic comb or scale is charged while the paper is uncharged .Other plastic does not attract as they are uncharged or they contain static charge which does not transfer .

Hope it help...

Answer 2

Answer :

Explanation :

• As we know that if we bring a plastic comb near some very tiny pieces of paper, it will not have any effect on them. If, however, the comb is first rubbed with dry hair and then brought near the tiny pieces of paper, we find that the comb now attracts the pieces of paper towards itself.

Question :

How does this force generate?

• The comb is electrically neutral  so it has no effect on the tiny pieces of paper. When the comb is rubbed with dry hair, then it gets electric charge.
• This electrically charged because comb exerts an electric force on the tiny pieces of paper and attracts them.
• Similarly, a glass rod rubbed with silk cloth; and an ebonite rod rubbed with woolen cloth also acquire the ability to attract small pieces of paper and are said to have electric charge.

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