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Power

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Question

Imagine a Carnot engine that operates between the temperatures $T_{H}$ 850 K and $T_{L}$ 300 K. The engine performs 1200 J of work each cycle, which takes 0.25 s. What is the efficiency of this engine?

A

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B

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C

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D

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Solution

The correct option is B

The efficiency of the engine can be calculated by the formula in the hint

$η = 1 - \frac{300}{850}$

$= 1 - \frac{6}{17} = \frac{11}{17}$

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