A electric heater of resistance 8 ohm takes a current of 15 A from the mains supply line.calculate the rate at which heat is developed in the heater.

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Solution

$Rate of heat = I^{2} R$
$H = 15^{2} \times 8 = 1800 J / s$

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A electric heater of resistance 8 ohm takes a current of 15 A from the mains supply line.calculate the rate at which heat is developed in the heater.

Rate of heat=I2RH=152×8=1800J/s

$Rate of heat = I^{2} R$
$H = 15^{2} \times 8 = 1800 J / s$