Home
Class 12
PHYSICS
A carnot engine first works between 100^...

A carnot engine first works between `100^@C `and `0^@C` and then between `0^@C` and `-100^@C` What is the ratio of its efficiency in these two cases ?

A

0.51

B

0.63

C

0.73

D

0.85

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • THERMAL PROPERTIES OF MATTER (HEAT TRANSFER)

    MBD PUBLICATION|Exercise QUESTION BANK|217 Videos

  • VECTOR ANALYSIS

    MBD PUBLICATION|Exercise QUESTION BANK|250 Videos

Similar Questions

Explore conceptually related problems

If a Cannot engine works between 200^@C and 400^@C , what is its efficiency ?

If a carnot engine operators between 27^@C and 127^@C then it’s efficiency is_____.

A Carnot engine is working between two temperature 327^@C and 227^@C , find its efficiency.

If a carnot engine is working between temperatures 27^@C and 227^@C , what is its efficiency ?

Distinguish between A.C. and D.C.

Give relation between C_p and C_v .

Distinguish between C_3 and C_4 plants

MBD PUBLICATION-THERMODYNAMICS-QUESTION BANK
  1. The efficiency of an ideal heat engine can be100% if the sink (exhaust...

    Text Solution

    |

  2. A carnot engine has the same efficiency between 100 K and 500 K and T ...

    Text Solution

    |

  3. A carnot engine first works between 100^@C and 0^@C and then between 0...

    Text Solution

    |

  4. A carnot engine takes in heat from a reservoir of heat at 427^@C and g...

    Text Solution

    |

  5. In the carnot engine, heat Q1 is absorbed from the source at temperatu...

    Text Solution

    |

  6. The temperatures of the source and the sink of a heat engine are 127^@...

    Text Solution

    |

  7. Ina Carnot engine, the temperature of the reservoir is 927^@C and that...

    Text Solution

    |

  8. In an ideal refrigerator, heat from inside at 280 K is transferred to ...

    Text Solution

    |

  9. The inside and outside temperatures of a refrigerator are 273 K and 30...

    Text Solution

    |

  10. The temperature of a refrigerator is kept at7^@C to keep the food arti...

    Text Solution

    |

  11. A refrigerator abstracts 1600 calories of heat from the ice trays. The...

    Text Solution

    |

  12. A carnot engine has an efficiency of 20%. The energy is supplied to th...

    Text Solution

    |

  13. For a carnot engine the source and the sink temperatures are 527^@C an...

    Text Solution

    |

  14. A carnot engine operates between 227^@C and 127^@C. It absorbs 80 kilo...

    Text Solution

    |

  15. The efficiency of a heat engine is 50% and the temperature of the sink...

    Text Solution

    |

  16. A carnot engine whose sink is at 300^@ K has an efficiency of 40%. By ...

    Text Solution

    |

  17. What is the least amount of work that must be done to freeze ten gram ...

    Text Solution

    |

  18. The efficiency of a heat engine is eta and the coefficient of performa...

    Text Solution

    |

  19. A carnot engine, having an efficiency eta=1/10as heat engine, is used ...

    Text Solution

    |

  20. One gm of water at 373 K is converted into steam at the same temperatu...

    Text Solution

    |