Question

An electric heater of resistance 8 ohm draws 15 A current from service main for 2 hrs
Calculate heat energy produced??​

Answer 1

Answer:

An electric heater of resistance 8 Ω draws 15 A from the service mains for 2 hours. Calculate the rate at which heat is developed in the heater. Therefore, heat is produced by the heater is 1800 J/s.

Answer 2

Answer:

$h \: = {i}^{2} rt \\ h \: = {15}^{2} \times 8 \times 2 \times 60 \times 90 \\ i \: = 12960000 \\ i \: = 1.29 \times {10}^{7} joule$