A refrigerator uses 1000w to keep your food cold. How much power is saved if a different refrigerator with a coefficient of performance of 3 is used?
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In case of heat engine, efficiency is defined as ratio of workdone (desired paramter from the system) to heat energy supplied. Here impotant criteria is net work done
In case of a refrigerator ,COP is the ratio of heat absorbed (desired paramter from the sysem ) to work done on the system ,Here the important criteria is heat abosorbed or refrigeration effect.
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