Exam-style question
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How is the efficiency of a heat engine calculated?.
- A.Efficiency = (Useful work output / Total energy input) x 100
- B.Efficiency = (Total energy input / Useful work output) x 100
- C.Efficiency = (Useful work output / Total work done) x 100
- D.Efficiency = (Total work done / Useful work output) x 100
Model answer
What a good answer should say
- Efficiency = (Useful work output / Total energy input) x 100
Explanation
Why this works
The efficiency of a heat engine is calculated using the formula Efficiency = (Useful work output / Total energy input) x 100. This formula quantifies how effectively the engine converts energy input into useful work.
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