How many electrons form a current of 1 microampere?

Concept:

The rate of flow of electrons is known as current.
We know 1 Ampere is defined as the amount of charge flowing through the conductor in 1 second.
And the formula for current is given by the relation $I= \frac{q}{t}$, where q is the amount of charge, t is the time taken for the flow.
We know $q=\mathit{ne}$, where n is the number of charge particles and e is the amount of charge on an electron ($1.6 \times {10}^{-19}$C) .
Here $I=1\mathit{\mu A},$t=1s, we know $1\mathit{\mu A}={10}^{-6}A$
$I=\frac{\mathit{ne}}{t}$ $n=\frac{\mathit{It}}{e}$ Substituting the values in above equation, we get
$n=\frac{1 \times 1}{1.6 \times {10}^{-19}}=6.25 \times {10}^{12}$
Therefore, number of electron = $6.25 \times {10}^{12}$