Home
Class 12
PHYSICS
A black rectangular surface of area A em...

A black rectangular surface of area A emits energy E per second at `27^circC`. If length and breadth are reduced to one third of initial value and temperature is raised to `327^circC`, then energy emitted per second becomes

A

`(4E)/9`

B

`(7E)/9`

C

`(10E)/9`

D

`(16E)/9`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • KINETIC THEORY OF GASES AND RADIATION

    TARGET PUBLICATION|Exercise Evaluation test|18 Videos

  • KINETIC THEORY OF GASES AND RADIATION

    TARGET PUBLICATION|Exercise critical thinking|104 Videos

  • INTERFERENCE AND DIFFRACTION

    TARGET PUBLICATION|Exercise EVALUATION TEST|20 Videos

  • MAGNETIC EFFECT OF ELECTRIC CURRENT

    TARGET PUBLICATION|Exercise EVALUATION TEST|19 Videos

Similar Questions

Explore conceptually related problems

A black rectangular surface of area A emits energy E per second at 27^circC . If length and breadth are reduced to initial value and temperature is raised to 327^circC , then energy emitted per second becomes

The rectangular surface of area 8 cm xx 4 cm of a black body at temperature 127^(@)C emits energy E per section if length and breadth are reduced to half of the initial value and the temperature is raised to 327^(@)C , the ratio of emission of energy becomes

The rectangular surface area 12cm xx 6cm of a black body at a temperature of 127^(@)C , emits heat energy at the rate of Q units per second. If the length and breadth of the surface area are each reduced to half of its initial value and the temperature is increased to 327^(@)C , then the rate of emission of heat energy will be

The temperature of the body is increased from -73^(@)C to 357^(@)C , the ratio of energy emitted per second is

The energy emitted per second by a black body at 27^(@)C is 10 J. If the temperature of the black body is increased to 327^(@)C , the energy emitted per second will be

Two spheres have radii 1m , 2m are at same temperatures, have emissivites e 2e then ratio of radiant energy emitted per second is .

The law which relates the energy radiated per second by unit area of a body and fourth power of absolute temperature of body is

The energy emitted per second by a black body at 1227^(@)C is E. If the temperature of the black body is increased to 2727^(@)C the energy emitted per second in the terms of E in the second case.

Two spheres made of same material have radii in the ratio 1: 2 Both are at same temperature. Ratio of heat radiation energy emitted per second by them is

TARGET PUBLICATION-KINETIC THEORY OF GASES AND RADIATION -Competitive thinking
  1. Three objects coloured black, gray and white can withstand hostile con...

    Text Solution

    |

  2. Two perfect blacd bodies A1 and A2 made out of same material have diam...

    Text Solution

    |

  3. A black rectangular surface of area A emits energy E per second at 27^...

    Text Solution

    |

  4. If the temperature of the sun (black body) is doubled, the rate of ene...

    Text Solution

    |

  5. If the temperature of the sun were to increase form T to 2T and its ra...

    Text Solution

    |

  6. The dimensions of stefan 's constant are

    Text Solution

    |

  7. Two spherical black bodies of radii R(1) and R(2) and with surface tem...

    Text Solution

    |

  8. A black body radiates 20 W at temperature 227^(@)C. If temperature of ...

    Text Solution

    |

  9. A body radiates energy 5 W at a temperature of 127^(@)C . If the tempe...

    Text Solution

    |

  10. Rate of loss of heat of two spheres at same temperature having radii i...

    Text Solution

    |

  11. Rates of emission of heat by perfectly black body maintained at temper...

    Text Solution

    |

  12. A black body at 227^(@)C radiates heat at the rate of 7 cal cm^(-2) s...

    Text Solution

    |

  13. The temperature of two bodies A and B are respectively 727^(@)C and 32...

    Text Solution

    |

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

    Text Solution

    |

  15. The surface of a black body is at a tempera ture 727^(@)C and its cros...

    Text Solution

    |

  16. A metal ball of surface area 200 cm^(2) and temperature 527^(@)C is ...

    Text Solution

    |

  17. A black body of emissive power 81 J/m^(2) s when it is at 300 K and or...

    Text Solution

    |

  18. A spherical black body with a radius of 12 cm radiates 450 watt power ...

    Text Solution

    |

  19. Parallel rays of light of intensity I=912 WM^-2 are incident on a sphe...

    Text Solution

    |

  20. A sphere at temperature 600 K is placed in an enviroment to temperatur...

    Text Solution

    |