Question

A steady current of 0.5A flows through a wire.

a. How much charge passes through it in one hour?

b. What is the number of electrons that pass through the wire during this time?

Answer 1

(a)

$$q=It\\ =\rm 0.5\: A\times 3600\: s=1800\: C$$

(b)

$$N=\frac{1800\:\rm C}{1.6\times 10^{-19}\:\rm C}=1.13\times10^{22}$$