Physics · 2019
JEE Main · 9 January 2019, Shift 2 · Q10
Two Carnot engines A and B are operated in series. The first one, A, receives heat at T_1(=600 K ) and rejects to a reservoir at temperature T_2. The…
Two Carnot engines A and B are operated in series. The first one, A , receives heat at $\displaystyle \mathrm{T}_1(=600 \mathrm{~K})$ and rejects to a reservoir at temperature $\displaystyle \mathrm{T}_2$. The second engine B receives heat rejected by the first engine and, in turn, rejects to a heat reservoir at $\displaystyle \mathrm{T}_3(=400 \mathrm{~K})$. Calculate the temperature $\displaystyle \mathrm{T}_2$ if the work outputs of the two engines are equal:
Official answer
(3)
$\displaystyle 500$ K
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.