Physics XI Notes for Physics Notes

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Second Law of Thermodynamics- Old is Gold

  1. State second law of thermodynamics.
  2. Can the thermal efficiency of an engine ever be 100%? Give reason.
  3. State second law of thermodynamics.
  4. Petrol engine is less efficient than diesel engine. Explain?
  5. Why do diesel engines need no spark plugs?
  6. Distinguish between petrol and diesel engine.
  7. Can a room be cooled by leaving the doors of an electric refrigerator open in a closed room?
  8. Write down the statement of second law of thermodynamics.
  9. Is it possible to construct a heat engine that creates no thermal pollution?
  10. Explain why temperature of gas drops in adiabatic expansion.

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