A wire has a current of 6.0 mA in it. How many electrons pass a given point in a minute?

electrons-pass

#1

A wire has a current of 6.0 mA in it. How many electrons pass a given point in a minute?
A) 5
B) 360
C) 2.3 × 1018
D) 5.4 × 10-15

Answer:

Given
current =.610^-3 A
charge/time=6
10^-3 A
Here time =60 s
charge=?
so charge=610^-3 A60 s=0.36 coulomb
we know that
q=ne
where (n) is the number of electrons
and (e) is the charge on one electron =1.610^-19 coulomb
so n=q/e= 0.36 A/1.6
10^-19 coulomb=2.5*10^18
so answer is( c)