Physics · 2021
JEE Main · 27 August 2021, Shift 2 · Q26
A heat engine operates between a cold reservoir at temperature T_2=400 K and a hot reservoir at temperature T_1. It takes 300 J of heat from the hot…
A heat engine operates between a cold reservoir at temperature $\displaystyle \mathrm{T}_2=400 \mathrm{~K}$ and a hot reservoir at temperature $\displaystyle \mathrm{T}_1$. It takes $\displaystyle 300$ J of heat from the hot reservoir and delivers $\displaystyle 240$ J of heat to the cold reservoir in a cycle. The minimum temperature of the hot reservoir has to be
\_\_\_\_ K.
Official answer
500
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.