A refrigerator has to transfer an average of 263J/s of heat from temperature −10∘C to 25∘C. What will be the average power consumed by the refrigerator? (Assume no power loss in the process)
A
15W
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B
35W
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C
394.5W
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D
920.5W
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Solution
The correct option is B35W Given Q2=263J/s T2=−10∘C = −10+273=263 K T1=25∘C = 25+273=298 K
β=Q2W=T2T1−T2 Work done per sec, W=Q2(T1−T2)T2 W=263(298−263)263 W=35W