railway RRB JE (CBT I + CBT II) Mock Test 2024 Refrigeration and Air Conditioning Refrigeration Cycles and Devices Heat Engine, Heat Pump and Refrigerator
A Carnot-refrigerator has a COP of 6. What is the ratio of the lower to the higher absolute temperature?
1
1/6
2
7/8
3
6/7
4
1/7