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NEET 1995 (AIPMT) · Heat Engines, Refrigerators & Second Law

Heat Engines, Refrigerators & Second Law question from NEET 1995 (AIPMT)

Q95NEET 1995 · AIPMTMedium

Heat Engines, Refrigerators & Second Law

An ideal Carnot engine, whose efficiency is 40%, receives heat at 500 K. If its efficiency is 50%, then the intake temperature for the same exhaust temperature is

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Answer: (c)

$T_2 = (1 - 0.4)(500) = 300\text{ K}$
For $\eta = 0.5$ : $T_1' = \frac{300}{0.5} = 600\text{ K}$
So the answer is (c) $600\text{ K}$ .

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