Question

find the number of electrons passing through a wire per second when the wire carries 4 ampere

Answer 1

i=4A
n=?
q=it
q=
$4 \times 1$
q=4C
n=q/e
n=
$4 \div 1.6 \times {10}^{ - 19}$
n=
$2.5 \times {10}^{19}$