Question

pieces of paper get attracted towards a plastic comb rubbed on the hair . it was give reasons .

Answer 1

Within the papers strips, the electrons geteither repelled or attracted according to whether the comb has a negative or a positive charge. ... Initially the comb is electrically neutral. So it has no effect on the tiny pieces of paper. When the comb is rubbed on a dry cloth, it gets electrically charged.

Answer 2

When the comb is rubbed on a dry cloth, it gets electrically charged. This charged comb exerts an electric force on the tiny pieces of paper and attracts them. Not always. When you comb ur hair, due to friction, there is a static current created, that leads the piece of paper to attractover comb.