• # question_answer A Carnot engine operates between ${{227}^{o}}C$ and ${{27}^{o}}C.$ Efficiency of the engine will be    A) $\frac{1}{3}$ B) $\frac{2}{5}$ C) $\frac{3}{4}$ D) $\frac{3}{5}$

Correct Answer: B

Solution :

[b] $\eta =1-\frac{{{T}_{2}}}{{{T}_{1}}}=1-\frac{300}{500}=\frac{2}{5}$

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