The current in a wire is 4.0 amperes. What is the time required for 2.5 times 10^19 electrons to pass a certain point in the wire?

1 Answer
Sep 27, 2017

1 second

Explanation:

Formula for Current
I=q/t
I= Current
q= total charge
t=time taken to pass electron from a certain point

Number of Electrons =2.5xx10^19
Total charge q=n e=2.5xx10^19xx1.6xx10^-19=2.5xx1.6=4 C

Current I=1 "ampere"

I=q/t
t=q/I=(4C)/(4 A)=1 "second"