Question

2.12 x 1014 protons and 3.55 𝑥 1016 electrons; the charge on this object is ____

Coulombs.

Show your solution and answer to acquire the charge on the object in

Coulombs.

4.6325 x 1015 protons and 4.6325 x 1015 electrons; the charge on this object is

____ Coulombs.

Show your solution and answer to acquire the charge on the object in

Coulombs.

Answer 1

(a)

$$q_{net}=1.6*10^{-19}(2.12*10^{14}-3.55*10^{16})\\ =-5.65*10^{-3}\:\rm C$$

(b)

$$q_{net}=1.6*10^{-19}(4.6325*10^{15}-4.6325*10^{15})\\ =0\:\rm C$$