Question

electric heater draws a current of 5a and its element has resistance of 50 ohms if the heater is switched on for 5 minutes calculate the energy releasedvin kj

Answer 1

i=5A
R=50ohms
t=5 minutes=300 s
H=i2rt
=5^2*50*300
=25*50*300
=375000J
=375kJ
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