Home
Class 11
PHYSICS
An ideal heat engine working between tem...

An ideal heat engine working between temperature `T_(1)` and `T_(2)` has an efficiency `eta`, the new efficiency if both the source and sink temperature are doubled, will be

A

`eta/2`

B

`eta`

C

`2 eta`

D

`3 eta`

Text Solution

Verified by Experts

The correct Answer is:
B
In first case , `eta_(1) = (T_1-T_2)/(T_1)`
in second case `eta_(2) = (2T_(1)-2T_(2))/(2T_1) = (T_1-T_2)/(T_1) = eta` .
Promotional Banner

Topper's Solved these Questions

  • KINETIC THEORY OF GASES AND THERMODYNAMICS

    A2Z|Exercise Problems Based On Mixed Concepts|49 Videos

  • KINETIC THEORY OF GASES AND THERMODYNAMICS

    A2Z|Exercise Assertion Reasoning|15 Videos

  • KINETIC THEORY OF GASES AND THERMODYNAMICS

    A2Z|Exercise Application Of First Law Of Thermodynamics In Different Situations|25 Videos

  • GRAVITATION

    A2Z|Exercise Chapter Test|29 Videos

  • MOCK TEST

    A2Z|Exercise Motion With Constant Acceleration|15 Videos

Similar Questions

Explore conceptually related problems

An ideal heat engine working between temperature T_(H) and T_(L) has efficiency eta . If both the temperature are raised by 100 K each the new efficiency of heat engine will be

The efficiency of a carnot heat engine is 0.6 when the absolute temperatures of the source and sink are T_(1) and T_(2) respectively. The efficiency of another carnot engine is also 0.6 but the source and sink temperatures are different. What are the temperatures of the source and the sink of the other engine ?

The efficiency of Carnot engine when source temperature is T 1 and sink temperature is T 2 will be

A heat engine works between a source and a sink maintaned at constant temperatures T_(1) and T_(2) . For the efficiency to be greatest

A heat engine works between source and sink temperatures 150°C and 30°C respectively.The efficiency of heat engine may be

A carnot engine operating between temperatures T_(1) and T_(2) has efficiency. When T_(2) is lowered by 62K, its efficience increases to (1)/(3) . Then T_(1) and T_(2) are respectively:

Efficiency of carnot heat engine,if source temperature is T1K and sink temperature is T2K

A2Z-KINETIC THEORY OF GASES AND THERMODYNAMICS-Second Law Of Thermodynamics
  1. In a Carnot engine when T(2) = 0^(@)C and T(1) = 200^(@)C its efficien...

    Text Solution

    |

  2. A Carnot engine has the same efficiency between 800 K to 500 K and x K...

    Text Solution

    |

  3. A Carnot's engine is made to work between 200^(@)C and 0^(@)C first an...

    Text Solution

    |

  4. Efficiency of a Carnot engine is 50% when temperature of outlet is 500...

    Text Solution

    |

  5. An ideal heat engine working between temperature T(1) and T(2) has an ...

    Text Solution

    |

  6. An ideal refrigerator has a freezer at a temperature of -13^(@)C. The ...

    Text Solution

    |

  7. In a mechanical refrigerator the low temperature coils are at a temper...

    Text Solution

    |

  8. An engine is supposed to operate between two reservoirs at temperature...

    Text Solution

    |

  9. An ideal gas heat engine operates in Carnot cycle between 227^(@)C and...

    Text Solution

    |

  10. Two Carnot engines are operated in succession. The first engine receiv...

    Text Solution

    |

  11. A Carnot engine whose low temperature reservoir is at 7^(@)C has an ef...

    Text Solution

    |

  12. Carnot cycle (reversible) of a gas represented by a pressure volume cu...

    Text Solution

    |

  13. A motor cycle engine delivers a power of 10 kW, by consuming petrol at...

    Text Solution

    |

  14. A heat engine receives 50 kcal of heat from the source per cycle, and ...

    Text Solution

    |

  15. A Carnot's engine operates with an efficiency of 40% with its sink at ...

    Text Solution

    |

  16. The efficiency of a Carnot cycle is 1//6. By lowering the temperature ...

    Text Solution

    |

  17. A Carnot heat engine has an efficiency of 10%. If the same engine is w...

    Text Solution

    |

  18. In a cold storage, ice melts at the rate of 2 kg//h when the external ...

    Text Solution

    |

  19. A Carnot engine used first an ideal monoatomic gas (gamma = 5//3) and ...

    Text Solution

    |

  20. Find the amount of work done to increase the engines ever developed op...

    Text Solution

    |