An electric heater with resistance of 15 ohms and 15 amps current from the service mains for 2 hours. calculate the rate at which the heat is developed in the heater
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Answer:
Given parameters
The resistance of the electric heater (R) = 8 Ω
Current drawn (I) = 15 A
Time = 2 hrs
T = 120 min x 60
Time (T) = 7200 secs
The rate of heat produced by the device in terms of power is expressed as
P= I2R
P = 15 x 15 x 8
P = 1800 watt
Answer
P= 1800 watt
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