An ideal heat engine has an efficiency `eta`. The cofficient of performance of the engine when driven backward will be

Relationship between efficiency of heat engines and coefficient of performance.

An ideal heat engine can be 100% efficient if its sink is at

Explain the heat engine and obtain its efficiency.

The efficiency of an ideal heat engine is

The efficiency of a Carnot heat engine

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

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