Section: Thermodynamics | Marks: 2
Consider the following statements related to the second law of thermodynamics: P. A cyclic heat engine cannot produce net work by exchanging heat only with one reservoir. Q. The efficiency of a reversible heat engine is dependent on the nature and amount of working substance undergoing the cycle. R. It is impossible to have a cyclic device which will produce no effect other than the transfer of heat from a cold body to a hot body. S. It is impossible to have heat engines operating between a heat source and sink to have a lower efficiency than that of a reversible heat engine operating between the same source and sink. For which of the following options, BOTH the statements are inconsistent with the second law of thermodynamics:
- A. P and R
- B. P and Q
- C. R and S
- D. Q and S
Answer: D. Q and S