ISRO Mechanical & Aerospace 2012 - Question 59

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Frictionless heat engine 100% efficient only if exhaust temp is

  • A. Equal to input
  • B. Less than input
  • C. 0 K
  • D. 0 C

Answer: C. 0 K

Explanation: Carnot efficiency = 1 - TL/TH. 100% implies TL=0.

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