The efficiency of the heat engine can be defined as _.
Correct answer: A. 1-(Q2/Q1)
- A. 1-(Q2/Q1)
- B. 1+(Q2/Q1)
- C. 1-(Q1/Q2)
- D. 1+(Q1/Q2)
Explanation
Correct option:AThe efficiency of a heat engine is defined as the ratio of the work output to the heat input. Mathematically, it is given by the formula:Efficiency = 1 - (Q2 / Q1)where Q1 is the heat input and Q2 is the heat output or rejected. This equation represents the fraction of heat input that is converted into useful work, with the remaining fraction being rejected as waste heat. Therefore, option A is the correct choice.
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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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