Question

A current of 1mA is flowing through a copper wire.the no. of electron crossing any points in the conductor per second will be?
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Answer 1

The charge will be 6.25 × 10^15 C

Explanation:  

As it is known that the current is just flow of charges per unit time. So, now we are going to find number of charges per second.

We know that  

I = ne/t  

n = It/e  

where, e is the magnitude of charge of electron

n = (1m)(1)/(1.6 × 10^-19)

n =  6.25 × 10^15 C