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A heat engine has an efficiency eta. Tem...

A heat engine has an efficiency `eta`. Temperatures of source and sink are each decreased by 100K. Then, the efficiency of the engine

A

Increases

B

decreases

C

remain constant

D

Becomes 1

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The correct Answer is:
A
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AAKASH SERIES-THERMODYNAMICS-EXERCISE - 1A
  1. Which of the following is not possible in a cyclic process ?

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  2. The relation between internal energy U, pressure P and volume V of a g...

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  3. A heat engine has an efficiency eta. Temperatures of source and sink a...

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  4. A system is taken from a given initial state to a given final state al...

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  5. A carnot has the reversible processes the following order

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  6. A triatomic, diatomic and monoatomic gas is supplied same amount of he...

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  7. A gas may expand either adiabatically or isothermally. A number of P-V...

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  8. Explain why (a) Two bodies at different temperatures T(1) and T(2) i...

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  9. Two cylinder A and B of equal capacties to each other via a stopcock. ...

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  10. In the figure below, two systems A and B are seperated by an insulatin...

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  11. Which of the following statements is correct for any thermodynamics sy...

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  12. The two gases are seperated by a fixed diathermic wall, with initial s...

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  13. What will be the nature of change in internal energy in case of preces...

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  14. For a certain mass of gas Isothermal relations between 'P' and 'V' are...

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  15. Figure shows two prpcesses A and B on a system. Let DeltaQ(1) and Delt...

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  16. The following are the P-V diagrams for cyclic process for a gas. Then ...

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  17. Referring to figure of previous question let DeltaU(1) and DeltaU(2) b...

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  18. Consider the process on a system shown in figure. During the process, ...

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  19. An ideal gas goes from the state I to to the state f as shown in figur...

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  20. Consider two processes on a system as shown in figure. The volumes in ...

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