Question

Power of an electric heater working in 230 V is 1000 W . Calculate the heat produced if the current pass for 5 minutes through the circuit.

Answer 1

3 x $10^{5}$ J

We know,

Time (t) = 5 min = 300 s

Power (P) = $I^{2}R$ = 1000 W

Heat Generated (E) = $I^{2}Rt$ = Pt = 1000*300  = 3 x $10^{5}$ J

Answer 2

Answer:

P=1000 watt

Time=5 min=60×5=300 sec

heat=power x Time

heat=1000 x 300

Heat= 300000 joule/sec

heat = 300kj/sec