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Thermodynamics — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsThermodynamics1 Mark
MCQ
An engine is supposed to operate between two reservoirs at temperature $727^{\circ} \mathrm{C}$ and $227^{\circ} \mathrm{C}$. The maximum possible efficiency of such an engine is
  • ✓
    $1 / 2$
  • B
    $1 / 4$
  • C
    $3 / 4$
  • D
    1
✓

Answer

Correct option: A.
$1 / 2$
(a) $\quad \eta=\frac{T_1-T_2}{T_1}=\frac{(273+727)-(273+227)}{273+727}=\frac{1000-500}{1000}=\frac{1}{2}$

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