Calculate the quantity of heat that will be produced in a coil of resistance 75 Ω if a current of 2A is passed through it for 2 minutes.
R = 75Ω, i = 2A, t = 2 minutes = 2 x 60 s = 120s
Heat energy produced in the coil, H = i2Rt
= 22 x 75 x 120
= 300 x 120 = 36000 J