When does any refrigerator or heat pump work?
- AWhen external work is done on the system.
- BWhen the system does work on the surroundings.
- CWhen the system is in thermal equilibrium.
- DWhen the system is isolated from the surroundings.
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Similar Questions
$A$ refrigerator is to maintain eatables kept inside at $9^{\circ} C$. If room temperature is $36^{\circ} C$,calculate the coefficient of performance.
Easy
View Solution$A$ Carnot heat engine has an efficiency of $10 \%$. If the same engine is worked backward to obtain a refrigerator,then the coefficient of performance of the refrigerator is
The temperature of the freezer compartment of an ideal refrigerator is $-13 \, ^\circ C$. If the coefficient of performance of the refrigerator is $5$,then the temperature of the surroundings (to which heat is rejected) is:
Medium
View SolutionWhy can the coefficient of performance of a refrigerator never be infinite?
Medium
View SolutionFor a refrigerator,heat absorbed from the cold reservoir (sink) is $500\, J$ and heat rejected to the hot reservoir (source) is $800\, J$. The coefficient of performance is:
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