Question

A conductor carries a current of 0.2a . Find the amt. of charge hat will pass through the cross section of a conductor in 30 sec. How many electrons will flow in this time interval of the charge on 1 electron is 1.6 x 10^-19

Answer 1

pls see the attachment

Answer 2

e = 1.6 * 10⁻¹⁹ Coulombs
current I = 0.2 Amperes
time duration t = 30 seconds

Charge = Q = current * time duration = I * t = 0.2 sec * 30 sec = 6 coulombs

number of electrons that are equal to this charge = 6 Coulombs / 1.6 * 10⁻¹⁹ coulombs
                    = 3.75 * 10¹⁹    
 
If this many electrons pass through a cross section of the conductor in 30 seconds time.