Question

what will be the number of electrons passing through the filament of an electric bulb in 10 seconds if the current of 2 ampere​

Answer 1

Explanation:

You can use direct formula as follows,

I=ne/t

or,n=It/e

or,n=(2×10)/1.6×10^-19

multiply numerator and denominator by 10 and then solve you will get the following,

n=200/16×10^-19

n=12.5/10^-19

Hence,n=1.25×10^20 electrons Ans