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A Carnot engine operates between temperatures 500 K (hot reservoir) and 300 K (cold reservoir). What is its efficiency?

medium MCQ 2 marks Class 11 · Physics · Thermodynamics
  1. 40%
  2. 20%
  3. 60%
  4. 30%
Answer
40%

The correct answer is 40% — Correct option is a) 40%

Step-by-step solution

  1. Efficiency η = 1−T_c/T_h
  2. η = 1−300/500
  3. η = 1−0.6
  4. η = 0.4 = 40%
  5. Correct option is a) 40%
Common mistake: Subtracting hot from cold temperature

Concept tested: Carnot engine efficiency

Published · How this solution was prepared and checked

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