Question

A current of 1 milli ampere flows in a conductor find the number of electrons flowing per second

Answer 1

One ampere is equivalent to one Coulomb of charge flowing per second. Since each electron carries 1.6 x 10-19 Coulombs of charge, a current of one ampere represents a flow of (1/1.6) x 10+19 electrons or 6.22 x 10+18 electrons each second. The above applies to a steady flow of 1 ampere of direct current (DC).