Question

How many electrons are flowing per second past a point in a circuit in which there is a current of $5amp$?

Answer 1

Given that,

Current $i=5A$

Time $t=1s$

Charge $e=1.6\times {10}^{-19}C$

We know that,

$Q=it$

$ne=it$

$n=\frac{it}{e}$

$n=\frac{5\times 1}{1.6\times {10}^{-19}}$

$n=3.125\times {10}^{19}$

$n=3125\times {10}^{16}$

Hence, the number of electrons is $3125\times {10}^{16}$