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A carnot engine whose sink is at 300 K h...

A carnot engine whose sink is at 300 K has an efficiency of 50%. by how much should the temperature of source be increased so as the efficiency becomes 70% ?

A

100K

B

200K

C

300K

D

400K

Text Solution

Verified by Experts

The correct Answer is:
D
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AAKASH INSTITUTE ENGLISH-THERMODYNAMICS-EXERCISE
  1. When are the two bodies in thermal equilibrium?

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  2. Which of the following P-V curve best represents. As isothermal proces...

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  3. Work done in given cyclic process is

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  4. INDICATOR DIAGRAM

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  5. In an isothermal process for an ideal gas

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  6. When gas in a vessel expands, it internal energy decreases. The proces...

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  7. Which of the following laws of thermodynamics defines the term interna...

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  8. Select the incorrect statement

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  9. Which of the following is not a path function ?

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  10. What is the work done by 0.2 mole of a gas at room temperature to doub...

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  11. The value of eta may lie between

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  12. If a Carnot engine works between 127^@C and 727^@C, then its efficien...

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  13. If the temperature of sink is at absolute zero, then the efficiency of...

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  14. A carnot engine whose sink is at 300 K has an efficiency of 50%. by ho...

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  15. A Carnot engine takes 9000 cal of heat from a reservoir at 627^@C and ...

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  16. A process can be reversible if

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  17. In practise, all heat engines have efficiency less than that of a carn...

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  18. The effiency of reversible engine isthe irreversible engine.

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  19. A carnot cycle consists of

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  20. A carnot engine is working in such a temperature of sink that its effi...

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