Home
Class 12
PHYSICS
An ideal Black-body at room temperature ...

An ideal Black-body at room temperature is thrown into a furnace. It is observed that

A

initially it is the darkest bod and at later times the brightest.

B

It is the darkest body at all times.

C

It cannot be distinguished at all times.

D

initialy is the darkest body and at later times it cannot be distinguished.

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • HEAT AND TEMPERATURE

    FIITJEE|Exercise ASSIGNMENT PROBLEMS (OBJECTIVE) (LEVEL-I) (ASSERTION AND REASON)|2 Videos

  • HEAT AND TEMPERATURE

    FIITJEE|Exercise ASSIGNMENT PROBLEMS (OBJECTIVE) (LEVEL II)|20 Videos

  • HEAT AND TEMPERATURE

    FIITJEE|Exercise ASSIGNMENT PROBLEMS (SUBJECTIVE) (LEVEL II AND III)|15 Videos

  • GRAVITATION

    FIITJEE|Exercise Numerical based Question|2 Videos

  • KINEMATICS

    FIITJEE|Exercise NUMERICAL BASED QUESTIONS DECIMAL TYPE|5 Videos

Similar Questions

Explore conceptually related problems

A black body at high temperature emits thermal radiations of

The energy distribution E with the wavelength (lambda) for the black body radiation at temperature Kelvin T is shown in the figure. As the temperature is increased the maxima will

The shows a radiant energy spectrum graph for a black body at at temperature T If the temperature of the body is raised to a higher temperature T then choose the correct statement (s).

In the figure, the distribution of energy density of the radiation emitted by a black body at a given temperature is shown. The possible temperature of the black body is

The rate of dissipation of heat by a black body at temperature T is Q . What will be the the rate of dissipation of heat by another body at temperature 2T and emissivity 0.25 ?

A power radiated by a black body is P_0 . and the wavelength corresponding to the maximum energy is around lambda . On changing the temperature of the black body, It was observed that the power radiated is increased to 256/81P_0 . The shift in the wavelength corresponding to the maximum energy will be

FIITJEE-HEAT AND TEMPERATURE-ASSIGNMENT PROBLEMS (OBJECTIVE) (LEVEL-I)
  1. The gas law PV=constant is true for

    Text Solution

    |

  2. An ideal Black-body at room temperature is thrown into a furnace. It i...

    Text Solution

    |

  3. The internal energy of a system remains constant when it undergoes

    Text Solution

    |

  4. Two rods of similar area of cross section and length are joined as sho...

    Text Solution

    |

  5. Heat energy absorbed by a system in going through a cyclic process sho...

    Text Solution

    |

  6. The energy emitted per second by a black body at 1227^(@)C is E. If th...

    Text Solution

    |

  7. A sample of an ideal monoatomic gas is taken round the cycle ABCA as s...

    Text Solution

    |

  8. The average translational kinetic energy of O(2) (molar mass 32) molec...

    Text Solution

    |

  9. Steam at 373K is passed through a tube of radius 50 cm and length 3m. ...

    Text Solution

    |

  10. If the radii of two copper sphers are in the ratio 1:3 and increase in...

    Text Solution

    |

  11. The temperature gradient in a rod of 0.5 m long is 80^(@)C//m. If the ...

    Text Solution

    |

  12. The plots of intensity versus wavelength for three black bodies at tem...

    Text Solution

    |

  13. Calculate the difference in temperature between two sides of an iron p...

    Text Solution

    |

  14. One end of a 0.25 m long metal bar is in steam and the other is in con...

    Text Solution

    |

  15. The sun radiates maximum energy at wavelength 4753Å. The surface tem...

    Text Solution

    |

  16. The temperature of an ordinary electric bulb is round 3000 K. At what ...

    Text Solution

    |

  17. The temperature of a body is doubled but the rate fo theat radiaton re...

    Text Solution

    |

  18. A cylinder of radius R made of a material of thermal conductivity K1 i...

    Text Solution

    |

  19. A full radiator at 0^(@)C radiates energy at the rate of 3.2 xx 10^(4)...

    Text Solution

    |

  20. Temperature of hot end and cold end of a rod, which is in steady state...

    Text Solution

    |