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Conduction

A refrigerato...

Question

A refrigerator has to transfer an average of $263 J$ of heat per second from temperature $- 10^{o} C$ to $+ 27^{o} C$ . Assuming no other power losses, the average power consumed by the refrigerator in watt is:

A

300

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B

263

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C

187

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D

35

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Solution

The correct option is D $35$

COP + $\frac{T_{L}}{T_{H} - T_{L}}$

COP = $\frac{T_{L}}{T_{H} - T_{L}} = 7.514$

$\frac{Q_{H}}{W} = 7.514$
$W = \frac{263}{7.514} = 35 w a l t s$

Hence (D) is the correct answer

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