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Q. 2 (2 marks) (All Students) Using a stopwatch, thermometer, electronic balance and
electrical power meter, determine the efficiency of an electric kettle. Could the performance for
heating water be improved by using a heat pump instead of the electric element in the kettle?
Give an explanation for your answer.
Temperature = 22 degrees
1.7L of water
Kettle = 1kg
Water + kettle = 2.575kg
Voltage = 224.8v
Time = 3min => temperature = 61 degrees
Power supply = 50H
Power = 28.4w => 1870w
KWh= 0 => 0.407

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