KCET2013PhysicsThermodynamics
For which combination of working temperatures of source and sink, the efficiency of Carnot's heat engine is maximum?
Options
- A600 ~K , 400 ~K
- B400 ~K , 200 ~K
- C500 ~K , 300 ~K
- D300 ~K , 100 ~K
Correct answer
D. 300 ~K , 100 ~K
Step-by-step solution
The efficiency of Carnot's heat engine, = T₁-T₂ T₁ For given combinations ₁= 1 3 , ₂= 1 2 , ₃= 2 5 , ₄= 2 3 So, it is maximum for T₁=300 ~K and T₂=100 ~K