Question

why does a plastic comb rubbed with dry hair attract the bits of paper?

Answer 1

in the case of comb attracting tiny tiny bits of papers when rubbed with dry hair is because electrons from the dry hair gets transferred to the comb and now the comb induces a dipole in the bitties of paper and the paper gets attracted.........hope it will help you dear

Answer 2

By rubbing the comb with dry hair generate opposite charge on the comb due to which the comb attract the bits of paper