Question

If 2 x 10^9 electrons are transferred from a glass rod to a piece of silk by rubbing, what will be the net charges on both objects?​

Answer 1

Given info : 2 × 10⁹ electrons are transferred from a glass rod to a piece of silk by rubbing.

To find : the net charges on both object after rubbing are ..

solution : no of electrons transferred from a glass rod to a piece of silk , n = 2 × 10⁹

we know,

    the charge on each electron is e = 1.6 × 10⁻¹⁹ C.

∴ total charge of 2 × 10⁹ electrons , Q = ne

                                                               = 2 × 10⁹ × 1.6 × 10⁻¹⁹ = 3.2 × 10⁻¹⁰ C

therefore the net charge on the glass rod is +3.2 × 10⁻¹⁰ C [positive because electrons are removed from it ] and the net charge on the piece of silk is -3.2 × 10⁻¹⁰ C [negative because electrons are added into it]

Answer 2

How is change the Charge