Home
Class 12
PHYSICS
An ideal Carnot heat engine with an effi...

An ideal Carnot heat engine with an efficiency of `30%`. It absorbs heat from a hot reservoir at `727^(@)C`. The temperature of the cold reservoir is

A

`509^(@)C`

B

`427^(@)C`

C

`273^(@)C`

D

`218^(@)C`

Text Solution

Verified by Experts

The correct Answer is:
B
`eta = 1 - (T_(C))/(T_(H)) implies 0.3 = 1 - (T_(C))/(1000)`
Promotional Banner

Topper's Solved these Questions

  • GEOMETRICAL OPTICS

    ALLEN|Exercise EXERCISE -02|82 Videos

  • GEOMETRICAL OPTICS

    ALLEN|Exercise EXERCISE -03|11 Videos

  • GEOMETRICAL OPTICS

    ALLEN|Exercise SOME WORKED OUT EXAMPLES|84 Videos

  • CURRENT ELECTRICITY

    ALLEN|Exercise All Questions|427 Videos

  • GRAVITATION

    ALLEN|Exercise EXERCISE 4|9 Videos

Similar Questions

Explore conceptually related problems

A Carnot engine has an efficiency of 0.40. The Kelvin temperature of its hot reservoir is quadrupled, and the Kelvin temperature of its cold reservoir is doubled. What is the efficiency that results from these changes?

In Carnot engine, efficiency is 40% at hot reservoir temperature T. For efficiency 50% , what will be the temperature of hot reservoir?

A heat engine operates between a cold reservoir at temperature T_(2)=400 K and a hot reservoir at temperature T . It takes 300 J of heat from the hot reservoir and delivers 240 J of heat to the cold reservoir in a cycle. The minimum temperature of the hot reservoir has to be _____________ K.

An ideal Carnot's engine whose efficiency 40% receives heat of 500K. If the efficiency is to be 50% then the temperature of sink will be

A heat engine with a thermal efficiency of 40% does 100 J of work per cycle. How much heat (in J) is exhausted to the cold reservoir per cycle?

A carnot engine has an efficiency of 30% .Its efficiency is to be increased to 50% .By what must the temperature (in K) of the source be increased if the sink is at 300K ?

ALLEN-GEOMETRICAL OPTICS-EXERCISE -01
  1. Air is filled at 60^(@)C in a vessel of open mouth. The vessle is heat...

    Text Solution

    |

  2. One mole of an ideal gas undergoes a process p=(p(0))/(1+((V(0))/(V))...

    Text Solution

    |

  3. Two identical glass bulbs are interconnected by a thin glass tube. A g...

    Text Solution

    |

  4. As shown , a piston chamber pf cross section area A is filled with ide...

    Text Solution

    |

  5. A gas has volume V and pressure p. The total translational kinetic ene...

    Text Solution

    |

  6. A mixture of n(1) moles of monoatomic gas and n(2) moles of diatomic g...

    Text Solution

    |

  7. Four containers are filled with monoatomic ideal gases. For each conta...

    Text Solution

    |

  8. 10^(23) molecules of a gas strike a target of area 1 m^(2) at angle 45...

    Text Solution

    |

  9. From the following V-T diagram we can conclude:-

    Text Solution

    |

  10. The density in grams per litre of ethylene (C(2)H(4)) at STP is :-

    Text Solution

    |

  11. A gas is expanded from volume V(0) = 2V(0) under three different proce...

    Text Solution

    |

  12. Some of the thermodynamic parameters are state variables while some ar...

    Text Solution

    |

  13. For an ideal gas PT^(11) = constant then volume expansion coefficient ...

    Text Solution

    |

  14. The internal energy of a gas is given by U= 5 + 2PV. It expands from V...

    Text Solution

    |

  15. When water is heated from 0^(@)C to 4^(@)C and C(P) and C(V) are its s...

    Text Solution

    |

  16. The molar specific heat of the process V alpha T^(4) for CH(4) gas at...

    Text Solution

    |

  17. 5n , n and 5n moles of a monoatomic , diatomic and non-linear polyatom...

    Text Solution

    |

  18. The relation between U, p and V for an ideal gas in an adiabatic proce...

    Text Solution

    |

  19. What would be the efficiency of the heat engine diagramed as shown bel...

    Text Solution

    |

  20. An ideal Carnot heat engine with an efficiency of 30%. It absorbs heat...

    Text Solution

    |