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The heater element of a kettle has a constant resistance of 105ohm and apllied voltage of...

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Electrical Engineering

The heater element of a kettle has a constantresistance of 105ohm and apllied voltage of 240V
Calculate the time taken to raise the temperature of on litre ofwater from 15degrees celsius to 90 degrees celsius assuming thatonly 80% of the power input to the kettle is usefullyemployed
If the water equivalent of the kettle is 150g, find out how long itwill take tobraise a second litre of water through the sametemperature range immediately after the first time.

Answer & Explanation Solved by verified expert
4.4 Ratings (716 Votes)
1 For the first time say time taken is t seconds V 240volt R 105 ohm mass of water m 1000 gm specific heat ofwater c 4186 Jgm change in temperature 9015C 75C 80 of the power input in the kettle isemployed in heating the water2    See Answer
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