Q71 / 75 · JEE Main 2020 (07 Jan Shift 1) · Physics

A Carnot engine operates between two reservoirs of temperatures $900 K$ and $300 K$ . The engine performs $1200 J$ of work per cycle. The heat energy (in $J$ ) delivered by the engine to the low temperature reservoir, in a cycle, is _____________

Correct answer: 600

Solution

η = \frac{W}{Q_{h}} = 1 - \frac{300}{900} = \frac{2}{3}

Q_{h} = \frac{3}{2} W = 1800 J

Q_{L} = Q_{h} - W = 600 J

Hence, the correct answer is 600.

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