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Second Law of Thermodynamics

The efficienc...

Question

The efficiency of a Carnot engine which operates between the two temperature $T_{1} = 500 K$ and $T_{2} = 300 K$ is

50

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25

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75

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40

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Solution

The correct option is D $40$ %
Given : $T_{1} = 500$ K $T_{2} = 300$ K
Efficiency of Carnot engine $η = 1 - \frac{T_{2}}{T_{1}}$
$∴$ $η = 1 - \frac{300}{500} = 0.4$
Thus the Carnot engine is $40$ % efficient.

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