Question

A current of 2 A is passed through a coil of resistance 75Ω for 2 minutes. (a) How much heat energy is produced? (b) How much charge is passed through the resistance?

Answer 1

Given, current (I) = 2 A
Resistance, R = 75 Ω
Time, t = 2 min = 120s
(a) Heat produced, H = `I^2 Rt`

Or, H = `(2)^2` (75) (120)  J =  36000 J
(b) Charge passed, Q = It
Or, Q = (2) (120) C = 240 C