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If the absolute temperatures of the sour...

If the absolute temperatures of the source and sink of a heat engine are in the ratio `4 : 3`, its efficiency is

A

`25%`

B

`33.33%`

C

`13%`

D

`20%`

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CHETANA PUBLICATION-Thermodynamics-EXERCISE
  1. If two thirds of the heat taken by a heat engine from the source is gi...

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

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

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

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

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

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

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

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  9. Efficiency of a Carnot engine is large when

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  10. The second law of thermpdynamics deals with transfer of

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

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

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  13. State first law of thermodynamics.

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  14. Work done during expansion is positive. Explain.

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

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

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

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  18. Mention the set of processesin a Carnot cycle.

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  19. Distinguish between Reversible and Irreversible process.

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  20. 5 mol of oxygen is heated at constant volume from 10^@C to 20^@C. Find...

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