Question

How many electrons pass through a wire in 2 hour if the current passing through the wire is 200 MA

Answer 1

Answer:

t=2hrs=7200secs

I=200mA=200×10^-3A

Q=It

=200×10^-3×7200

=1440C

1 electron=1.6×10^-19C

1 coloumb=1/1.6×10^-19electrons

1440 c=1/1.6×10^-19×1440

=0.9×10^22electrons