A heat engine takes in 500 J from the hot reservoir and rejects 350 J to the cold reservoir. Its efficiency is:

  1. 70%
  2. 15%
  3. 30%
  4. 58.8%
Answer

C) 30%

W = QH - QC = 150 J; eta = WQH = 30%. SLO P-11-C-13 · Knowledge

Physics MCQ · More Heat Engines, Second Law and Entropy MCQs · Practise