The efficiency of Carnot's engine operating between reservoirs, m… - Vidyadip

MCQ

The efficiency of Carnot's engine operating between reservoirs, maintained at temperatures $27^{\circ} \mathrm{C}$ and $-123^{\circ} \mathrm{C}$, is

✓
$50 \%$
B
$24 \%$
C
$0.75 \%$
D
$0.4 \%$

✓

Answer

Correct option: A.

$50 \%$

(a) $\quad \eta=1-\frac{T_2}{T_1}=1-\frac{(273+123)}{(273+27)}=1-\frac{150}{300}=\frac{1}{2}=50 \%$

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