NEET Physics Thermodynamics Questions Solved


An ideal refrigerator has a freezer at a temperature of –13°C . The coefficient of performance of the engine is 5. The temperature of the air (to which heat is rejected) will be 

(1) 325°C

(2) 325K

(3) 39°C

(4) 320°C

(3) Coefficient of performance

K=T2T1T25=(27313)T1(27313)=260T1260

5T11300=2605T1=1560

T1=312K39°C

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