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11. thermodynamics — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysics11. thermodynamics1 Mark
MCQ
In practice, all heat engines have efficiency less than that of a Carnot engine because
  • A
    Carnot engine is irreversible
  • ✓
    A reversible process can never be attained in a real world
  • C
    Irreversible engine has higher efficiency than reversible engine
  • D
    Efficiency of Camot engine is always one
✓

Answer

Correct option: B.
A reversible process can never be attained in a real world
b
(b)

Theoreticel engine tht operates on the revasibh Cannot Cyele.

$A B$ (Infinite steps)

$\eta=1-\frac{T_l}{T_s}$

$T=0\,K$

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