Question

9x10 power 19 C of charge passes through a conductor in 10 seconds. The work done here is 10J.calculate the resistance offered by the conductor

Answer 1

The current flowing through a conductor is given by the amount of charge passing through the cross section of the conductor in a given time.

I = Q/t

Where I - current flowing, Q - charge, t - time

Charge can be calculated by the summation of number of charged particle flowing through the cross section multiplied by individual charge on the particle.

Q = n*e (e as here these are electons)

n = 6.25*(10^18) e = 1.6*(10^-19)

Q = {6.25*(10^18)} * {1.6*(10^-19)}

Q = 1 C

t = 5*60 = 300 sec

I = 1/300 = 3.33*(10^-3) A

I = 3.33 mA