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Which statements is incorrect?...

Which statements is incorrect?

A

All reversible cycles have same efficiency

B

Reversible cycle has more efficiency than an irreversible one

C

Carnot cycle is a reversible one

D

Carnot cycle has the maximum efficiency in all cycles

Text Solution

Verified by Experts

The correct Answer is:
A

All reversible engines work for different values of temperature of source and sink hence the efficients of all such engines are different. The incorrect statement is all reversible cycles have same efficiency.
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ALLEN-GEOMETRICAL OPTICS-EXERCISE - 05 (A)
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  3. Which statements is incorrect?

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  4. If mass-energy equivalence is taken into account, when water is cooled...

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  5. Even Carnot engine cannot give 100% efficiency because we cannot

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  6. "Heat cannot by itself flow from a body at lower temperature to a body...

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  7. Which of the following parameters does not characterize the thermodyna...

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  8. A Carnot engine takes 3xx10^6 cal of heat from a reservoir at 627^@C a...

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  9. Which of the following statements is correct for any thermodynamic sys...

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  10. Two thermally insulated vessel 1 and 2 are filled with air at temperat...

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  11. Which of the following is incorrect regarding the first law of thermod...

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  12. The temperature -entropy diagram of a reversible engine cycle is given...

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  13. A system goes from A and B via two processes. I and II as shown in fig...

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  14. Two rigid boxes containing different ideal gases are placed on a table...

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  15. The work of 146 kJ is performed in order to compress one kilo mole of ...

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  16. A Carnot engine, having an efficiency of eta=1//10 as heat engine, is ...

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  17. When a system is taken from state i to state f along the path iaf, it ...

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  18. Two moles of helium gas are taken over the cycle ABCDA, as shown in th...

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  19. Two moles of helium gas are taken over the cycle ABCDA, as shown in th...

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  20. Two moles of helium gas are taken over the cycle ABCDA, as shown in th...

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