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A Carnot engine, whose efficiency is 40%...

A Carnot engine, whose efficiency is `40%`, takes in heat from a source maintained at a temperature of 500K. It is desired to have an engine of efficiency `60%`. Then, the intake temperature for the same exhaust (sink) temperature must be:

A

`600K`

B

efficiency of Carnot engine cannot be made larger than `50%`

C

`1200K`

D

`750K`

Text Solution

Verified by Experts

The correct Answer is:
D
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ALLEN -GEOMETRICAL OPTICS-EXERCISE - 05 (A)
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  3. A Carnot engine, whose efficiency is 40%, takes in heat from a source ...

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  4. The above p-v diagram represents the thermodynamic cycle of an engine,...

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  7. A solid body of constant heat capacity 1J//^@C is being heated by keep...

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  8. Consider a spherical shell of radius R at temperature T. The black bod...

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  10. The P - V diagram of 2 gm of helium gas for a certain process A rarr B...

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  11. In an ideal gas at temperature T , the average force that a molecule a...

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  12. An experiment takes 10 minutes to raise the temperature of water in a ...

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  13. using euipartion of energy, the specific heat ("in" jkg^(-1)K^(-1)of a...

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  14. n' moles of an ideal gas undergoes a process AtoB as shown in the figu...

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  15. An ideal gas under goes a quasi static, reversible process in which it...

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  16. A pendulum clock loses 12s a day if the temperature is 40^@C and gains...

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  17. 200 g of water is heated from 40^(@)C "to" 60^(@)C . Ignoring the slig...

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  18. The ratio of work done by an ideal diatomic gas to the heat supplied b...

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  19. Which of the following shown the correct relationship between the pres...

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  20. A carbot freezer takes heat from water at 0^(@)C inside it and rejects...

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