For the successful operation of Heat engine which condition should be met ?
Correct answer: C. both A and B
- A. cyclic process
- B. operated at certain temperature difference
- C. both A and B
- D. none of these
Explanation
A heat engine must operate cyclically so that its working substance returns to its initial state, and it needs a temperature difference between a hot source and a cold sink to produce net heat flow and work. The likely mistake is choosing only one condition, although both are required here.
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About First Law of Thermodynamics
The first law relates heat supplied, work done and the change in internal energy through energy conservation. Problems use sign conventions and apply the law to isothermal, adiabatic, isobaric and isochoric processes. Internal energy is a state function, while heat and work depend on the path followed.
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