An engine is supposed to operate between two reservoirs at temperature $727°C$ and $227°C.$ The maximum possible efficiency of such an engine is
Medium
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(a) $\eta = \frac{{{T_1} - {T_2}}}{{{T_1}}} = \frac{{(273 + 727) - (273 + 227)}}{{273 + 727}}$$ = \frac{{1000 - 500}}{{1000}} = \frac{1}{2}$
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