Home
Class 12
PHYSICS
A black body at a temperature of 227^(@)...

A black body at a temperature of `227^(@)C` radiates heat energy at the rate of 5 cal/`cm^(2)`-sec. At a temperature of `727^(@)C`, the rate of heat radiated per unit area in cal/`cm^(2)`-sec will be

A

40

B

80

C

160

D

240

Text Solution

Verified by Experts

The correct Answer is:
B
`(E_(2))/(E_(1))=((T_(2))/(T_(1)))^(4)=((10000)/(500))^(4)=24=16`
`E_(2)=16xx5=80`
Promotional Banner

Topper's Solved these Questions

  • KINETIC THEORY OF GASES & RADIATION

    NIKITA PUBLICATION|Exercise MCQs (Newtons Law of Cooling)|40 Videos

  • KINETIC THEORY OF GASES & RADIATION

    NIKITA PUBLICATION|Exercise MCQs (Question Given in MHT-CET)|79 Videos

  • KINETIC THEORY OF GASES & RADIATION

    NIKITA PUBLICATION|Exercise MCQs (Kirchhoffs law of heat radiation)|19 Videos

  • INTERFERENCE AND DIFFRACTION

    NIKITA PUBLICATION|Exercise MULTPLE CHOICE QUESTIONS|333 Videos

  • MAGNETIC EFFECT OF ELECTRIC CURRENT

    NIKITA PUBLICATION|Exercise MCQs (Sensitivity and accuracy of M.C.G.)|1 Videos

Similar Questions

Explore conceptually related problems

A black body at a temperature of 227^(@)C radiates heat energy at the rate of 5 cal/cm-sec. At a temperature of 727^(@)C , the rate of heat radiated per unit area in cal/cm will be

A black body at temperature 227^(@)C radiates heat at the rate of 5 cal/ cm^(2) , at a temperature of 27^(@)C , the rate of heat radiated per unit area per unit time in cal/ cm^(2) s, is

A black body at a temperature of 127^(@)C raidates heat at the rate of 1cal//cm xx sec . At a temperature of 527^(@)C the rate of heat radiation from the body in (cal//cmxx sec) will be

A black body at 227^(@)C radiates heat at the rate of cal cm^(-2) s^(-1) . At a temperature of 727^(@)C , the rate of heat radiated in the same unit will be

A black body at ' 227^@ ' C radiates heat at the rate of ' 10 cal/cm^2s. At a temperature of '727^@' C the rate of heat radiated in same units will be

A black body of 127^(@)C radiates heat at the rate of 5cal//cm^(2) -second. At 527^(@)C , the rate of heat radiated in the same units will be

A black body, at a temperature of 227^@C , radiates heat at a rate of 20 cal m^(-2)s^(-1) . When its temperature is raised to 727^@C , the heat radiated by it in cal M^(-2)s^(-1) will be closest to

A black body at a temperature of 227^(@)C radius head at a rate of 20 cal m^(-2)s^(-1) . When its temperature is raised to 727^(@)C the radiated by it in cal m^(-2)s^(-1) will be closet

A black body at high temperature T K radiates energy at the rate of E W//m^(2) . When the temperature falls to (T//2) K , the radiated energy will be

NIKITA PUBLICATION-KINETIC THEORY OF GASES & RADIATION -MCQs (Stefans Law of Black Body Radiation)
  1. The rate of loss of heat by radiation frombody at 400^(@)C is R. then ...

    Text Solution

    |

  2. A ball is coated with lamp black. Its temperature is 327^(@)C and is p...

    Text Solution

    |

  3. A black body at a temperature of 227^(@)C radiates heat energy at the ...

    Text Solution

    |

  4. The temperature of a body is increased by 50%. The amount of radiation...

    Text Solution

    |

  5. Two solid spheres of radii R(1) and R(2) are made of the same material...

    Text Solution

    |

  6. Two spheres P and Q of the same colour and having radii 4 cm and 2 cm ...

    Text Solution

    |

  7. A black body at a temperature of 127^(@)C radiates heat at the rate of...

    Text Solution

    |

  8. The ratio of loss of heat from a metal sphere at 327^(@)C to that of t...

    Text Solution

    |

  9. The radiant energy from the Sun incident normally at the surface of ea...

    Text Solution

    |

  10. A body radiates heat at the rate of 50 J/s at 300 K. when the same bod...

    Text Solution

    |

  11. If the temperature of a hot body is raised would increased by

    Text Solution

    |

  12. A 60 w bulb has a filament temperature of 2000 K. what will be the wat...

    Text Solution

    |

  13. The surface of a house hold radiator has an emissivity of 0.5 and an a...

    Text Solution

    |

  14. A body emits Q cal/cm^(2) of radiation at temperature 227^(@)C. If the...

    Text Solution

    |

  15. The thermal capacities of two bodies A and B are in the ratio 1:4. if ...

    Text Solution

    |

  16. A black body is at a temperature of 527^(@)C, to radiate twice as much...

    Text Solution

    |

  17. If the temperature of a black body incresese from 7^(@)C to 287^(@)C ...

    Text Solution

    |

  18. Two solid sphere of copper have radii 10 cm and 8 cm respectively. The...

    Text Solution

    |

  19. In the above problem the ratio of the initial rate of fall of the temp...

    Text Solution

    |

  20. If the temperature of a body is reduced to half of in initial temperat...

    Text Solution

    |