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Carnot Cycle

A heat engine...

Question

A heat engine takes in $900 J$ of heat from a high-temperature reservoir and produces $300 J$ of work in each cycle. What is its efficiency?

A

35

%

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B

33

%

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C

43

%

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D

50

%

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Solution

The correct option is A $33$ %
Given, $Q_{h} = 900 J$ and $W = 300 J$
The efficiency of a heat engine is $η = \frac{W}{Q_{h}} = \frac{300}{900} = 0.333$
% of efficiency $= 0.333 \times 100 = 33.3$ % $\sim 33$ %

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