Paper is an insulator. It gets attracted to the comp through charging by induction. How can this be possible when there are no free electrons on insulators and then how can electrons move and induced charges are formed?

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Solution

Even though a paper is an insulator , it still contains electrons and protons in it ( positive charge and negative charge ) but the paper will remain neutral . But these charges can undergo polarisation in the prescence of an electric field. i.e. the charges moves in opposite directions in accordance with the type of Electric field applied.

When a charged comb is introduced the charges in the paper gets polarised so that an opposite charge is formed near the comb and as a result the paper bit gets attracted towards the comb.

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