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Two engines A and B have their sources a...

Two engines A and B have their sources at 400 K and 350 K and sinks at 350 K and 300 K respectively. Which is more efficient and by how much ?

A

`1.8%`

B

`1.7%`

C

`1.6%`

D

`1.5%`

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CHETANA PUBLICATION-Thermodynamics-EXERCISE
  1. A gas undergoes a change of state during which 100 J of heat is suppli...

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  2. The amount of work done to increase the temperature of one mole of an ...

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  3. Two engines A and B have their sources at 400 K and 350 K and sinks at...

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  4. If two thirds of the heat taken by a heat engine from the source is gi...

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  5. The efficiency of a heat engine is 20%, when the working substance is ...

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  6. If the absolute temperatures of the source and sink of a heat engine a...

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  7. Two Carnot engines A and B are operated in series. A receives heat at ...

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  8. A refrigerator has a coefficient of performance 9. If the surrounding ...

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  9. A refrigerator works between 0^@C and 27^@C. If heat is to be removed ...

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  10. A gas in a closed container is heated with 10 J of energy , causing t...

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  11. Which of the following is an example of the first law of thermodynamic...

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  12. Efficiency of a Carnot engine is large when

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  13. The second law of thermpdynamics deals with transfer of

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  14. During refrigration cycle, heat is rejected by the refrigerant in the

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  15. Select and write correct alternative from the following alternatives: ...

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  16. State first law of thermodynamics.

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  17. Work done during expansion is positive. Explain.

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  18. State zeroth law of thermo dynamics? OR Give the characteristics of is...

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  19. Draw a neat labelled diagram to show the energy flow of heat engine.

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  20. State both the statements of second law of thermodynamics.

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