Question

A charge of 80 C flows in a conductor for 2 minutes.
(a) Calculate the current flowing through the conductor.
(b) If the current through a heater is 4 A what charge must be passing in 8 seconds?

Answer 1

(a) Given, charge q = 80 C, time t = 2 minutes= 120 s

current, I = `"q"/"t" = 80/120` = 0.67 A

(b) Given, current I= 4 A, time = 8 s

Let q be the charge pas sing in 8s

Then, q =It = 4 x 8 = 32 C