The efficiency of the heat engine can be increased by:
Correct answer: B. Increasing the temperature of high temperature reservoir
- A. Decreasing the temperature of high temperature reservoir
- B. Increasing the temperature of high temperature reservoir
- C. Increasing the temperature of low temperature reservoir
- D. Increasing the temperature of both high temperature reservoir and low temperature reservoir
Explanation
The efficiency of a Carnot engine depends on the temperature of hot and cold reservoirs.The larger the temperature difference between the two reservoirs, the greater the efficiency. So, the efficiency of a heat engine can be increased either by "increasing the temperature of a high-temperature reservoir" or decreasing the temperature of a low-temperature reservoir.
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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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