Home
Class 11
PHYSICS
The cofficient of performance of a refri...

The cofficient of performance of a refrigerator is 5. If the temperature inside freezer is `-20^(@)C`, the temperature of the surroundings to which it rejects heat is :

A

`41^(@)C`

B

`11^(@)C`

C

`21^(@)C`

D

`31^(@)C`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • THERMAL PROPERTIES OF MATTER

    DISHA|Exercise All Questions|44 Videos

  • WAVE OPTICS

    DISHA|Exercise PHYSICS|44 Videos

Similar Questions

Explore conceptually related problems

If the coefficient of performance of a refrigerator is 5 and operates at the room temperature ( 27^(@) C), find the temperature inside the refrigerator.

If the co-efficient of performance of a refrigerator is 5 and operates at the room temperature (27^(@)C) , find the temperature indide the refrigerator.

The coeffcient of performance of a refrigerator working between 10^(@)C and 20^(@)C is

A Carnot refrigerator has freezer at temperature -8°C. The coefficient of performance of refrigerator is 5. The temperature of surrounding in which heat is rejected, will be

" An ideal refrigerator is used to transfer heat from a freezer at "-23^(@)C" to the surroundings at "27^(7)C" .Its coefficient of performance is :- "

An ideal refrigerator is used to transfer heat from a freezer at -23^@C to the surrounding at 27^@C . Its coefficient of performance is

DISHA-THERMODYNAMICS-PHYSICS
  1. An ideal gas is taken through the cycle AtoBtoCtoA, as shown in the fi...

    Text Solution

    |

  2. An ideal gas undergoing adiabatic change has the following pressure-te...

    Text Solution

    |

  3. In a thermodynamic process, pressure of a fixed mass of a gas is chang...

    Text Solution

    |

  4. The cofficient of performance of a refrigerator is 5. If the temperatu...

    Text Solution

    |

  5. Two gases have the same initial pressure, volume and temperature. They...

    Text Solution

    |

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

    Text Solution

    |

  7. For an ideal gas graph is shown for three processes. Process 1, 2 and ...

    Text Solution

    |

  8. During an adiabatic process an object does 100J of work and its temper...

    Text Solution

    |

  9. A refrigerator works between 4^(@)C and 30^(@)C. It is required to rem...

    Text Solution

    |

  10. A perfect gas goes from a state A to another state B by absorbing 8 × ...

    Text Solution

    |

  11. One mole of a diatomic ideal gas undergoes a cyclic process ABC as sho...

    Text Solution

    |

  12. Two Carnot engines A and B are operated in series. The engine A receiv...

    Text Solution

    |

  13. An ideal gas is initially at P1,V1 is expands to P2,V2 and then compre...

    Text Solution

    |

  14. Which of the following statements is correct for any thermodynamic sys...

    Text Solution

    |

  15. One mole of an ideal gas goes from an initial state A to final state B...

    Text Solution

    |

  16. A sample of an ideal gas in a cyclinder is compressed adiabatically to...

    Text Solution

    |

  17. A gas is compressed isothermally to half its initial volume. The same ...

    Text Solution

    |

  18. An ideal gas goes from State A to state B via three different process ...

    Text Solution

    |

  19. In the P-V diagram shown in figure ABC is a semicircle. The work done ...

    Text Solution

    |

  20. For an isothermal expansion of a perfect gas, the value of (DeltaP)/(P...

    Text Solution

    |