How many electrons pass through the cross section of a conductor in 10 ps at a current of 10 μA?

To find the required number of electrons passing through the cross section of the specified conductor, we use the equality: I * t = N * qe = q (charge), from where we express: N = I * t / qe.

Const: qе – electron charge (qе = -1.6 * 10-19 C).

Data: I – current (I = 10 μA = 10-5 A); t – elapsed time (t = 10 ps = 10-11 s).

Let’s calculate: N = I * t / qe = 10-5 * 10-11 / (1.6 * 10-19) = 625 electrons.

Answer: 625 electrons pass through the conductor in 10 ps.