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Two Carnot heat engines are connected in series such that the sink of the first engine is heat source of the second. Efficiency of the engines are ₁ and ₂ respectively. Net efficiency of the combination is given by

Options

  1. A= ₁+ ₂
  2. B= ₁ ₂ ₁+ ₂
  3. C= ₁+ ₂ (1- ₁ )
  4. D= ₁- ₂ (1- ₁ )

Correct answer

C. = ₁+ ₂ (1- ₁ )

Step-by-step solution

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