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  3. An electric heater of resistance 8 draws 15 A from the service mains for 2 hours. Calculate the rate at which heat is developed in the heater

. An electric heater of resistance 8 draws 15 A from the service mains for 2 hours. Calculate the rate at which heat is developed in the heater

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Answer: The rate at which heat is developed in the electric heater will be given by the power of the heater.

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Thus, the rate at which heat is developed in the heater is 1800 joules per second.

 

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