A refrigerator is:

  1. a perpetual motion machine
  2. a device that destroys heat
  3. a heat engine that makes cold
  4. a heat engine working in reverse, moving heat from cold to hot using work
Answer

D) a heat engine working in reverse, moving heat from cold to hot using work

Work input is required. SLO P-11-C-17 · Understanding

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