Question

How many electrons flow past a point in a wire each second if the wire has a current of 1.00 Amperes?

Answer 1

If the current is 1 Ampere, that means 1 Coulomb of charge will pass through a point in a wire each second.

The charge of one electron is equal to e = -1.602 * 10^-19 Coulombs.

So, to calculate the number of electrons that will have a total charge of 1 Coulomb, we can use the formula below:

$\begin{gathered} Q=n\cdot e\\ \\ -1=n\cdot(-1.602\cdot10^{-19})\\ \\ n=\frac{-1}{-1.602\cdot10^{-19}}\\ \\ n=0.624\cdot10^{19} \end{gathered}$

So the number of electrons is approximately 0.624 * 10^19.