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Question

An electric immersion heater with a resistance of 40 ohms is connected to a 240 V power supply. Calculate the current flowing through the heater and the amount of heat energy produced by the heater in 30 minutes.

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Solution

An electric immersion heater with a resistance of 40 ohms is connected to a 240 V power supply.Heat=V2tR=240230min4060=720J/h

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