Question

A current of 0.4 micro ampere is flowing through a wire then how much electrons are flowing per second .a given cross section of the wire

Answer 1

Given:

Current(I)=0.4 uA

=0.4×10^-6A

Charge of electron(e)=1.602*10^-19 coul.

To find: No of electrons (n )=?

We know, I= ne

Therefore, n=I/e

=0.4×10^-6/1.602×10^-19

=(0.4/1.602)×10^(-6+19)

=0.249×10^13

=249×10^10