Question

estimate the number of electrons passed through the wire if a current of 4 A flow for 4 sec please help me out​

Answer 1

Given:

Current flowing through the wire= 4A

Time for which the current flows = 4sec

To find:

Number of electrons passed through the wire for time = 4 sec

Solution:

Current flowing through the wire for 4 sec = 4 A

Total charge flowing  through the wire Q = It

Q = 4*4 = 16 Coulomb

As we know that the charge of electron e =1.6*10^-19 Coulomb

This number of electrons n = Q/e

n = 16 / 1.6*10^-19

n = 10^20 electrons

Therefore, the number of electrons flowing through the wire till time = 4 sec will be 10^20 electrons.