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11. thermodynamics — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysics11. thermodynamics1 Mark
MCQ
A carnot engine is made to work between $200\,^oC$ and $0\,^oC$ first and then between $0\,^oC$ and $-200\,^oC$. The ratio of efficiencies $\left( {\frac{{{\eta _2}}}{{{\eta _1}}}} \right)$ of the engine in two cases is
  • A
    $1:1.5$
  • B
    $1:1$
  • C
    $1:2$
  • ✓
    $1.73:1$
✓

Answer

Correct option: D.
$1.73:1$
d
$n = 1 - \frac{{{T_2}}}{{{T_1}}}$

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