Q 11-11-030NEETJEE MainMedium
An engine absorbs $1000$ J of heat from a source at $500$ K in each cycle and rejects heat to a sink at $300$ K. The maximum work it can do per cycle is
Answer: (A) $400$ J
The best possible is a Carnot engine: $\eta = 1 - \dfrac{300}{500} = 0.4$, so $W_{max} = 0.4 \times 1000 = 400$ J.
Solution by Sreeraj P, M.Sc Physics