Question

Calculate the number of electrons that flows per second across the cross - section wire when one ampere current flows through it.

Answer 1

Since, q = It, ...................(1)
and , q = ne
Hence, from eq. 1, n= I x t / e
where n is number of electrons
I is current flowing through a section of wire
t is time
e is charge of electron
n= 1/ 1.6X10^-19
= 0.625 X 10¹⁹