Question

Find the number of electrons in 20 micro ampere current which flows through a conductor in 1 minute.

Answer 1

Number of electrons,= 75×10^13

Explanation:

Given ,

I =20 uA

I=20×10^-6

T=1min

T=60sec

we know,

I=Q÷T

Q=20×10^-6×60

Q=120×10^-6 C

Now,

Q=ne

n= 120×10^-6C÷1.6x10^-19

n =75×10^13