Home
Class 11
PHYSICS
A surface at temperature T(0)K receives ...

A surface at temperature `T_(0)K` receives power `P` by radiation from a small sphere at temperature `T ltT_(0)` and at a distance d. If both `T` and d are doubled the power received by the surface will become .

A

`P`

B

`2P`

C

`4P`

D

`16P`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • TRANSMISSION OF HEAT

    NARAYNA|Exercise LEVEL -1 (C.W)|1 Videos

  • TRANSMISSION OF HEAT

    NARAYNA|Exercise LEVEL (C.W)|13 Videos

  • TRANSMISSION OF HEAT

    NARAYNA|Exercise LEVEL-II(C.W)|27 Videos

  • THERMODYNAMICS

    NARAYNA|Exercise Exercise|187 Videos

  • UNITS AND MEASUREMENTS

    NARAYNA|Exercise STATEMENT TYPE QUESTION|23 Videos

Similar Questions

Explore conceptually related problems

The power P is received by a surface at temperature T_(0)K from a small sphere at temperature

A black metal foil is warmed by radiation from a small sphere at temperature T and at a distance d it is found that the power received by the foil is P If both the temperature and the distance are doubled the power received by the foil will be .

Radiation from a black body at the thermodynamic temperature T_(1) is measured by a small detector at distance d_(1) from it. When the temperature is increased to T_(2) and the distance to d_(2) , the power received by the detector is unchanged. What is the ratio d_(2)//d_(1) ?

At temperature T , the power radiated by a body is Q watts . At the temperature 3 T the power radiated by it will be

A perfectly black body emits radiation at temperature T_(1) K. If is to radiate at 16 times this power, its temperature T_(2) K should be

If the temperature of the Sun were to increase from T to 2T and its radius from R to 2R. The rat io of power, radiated by it would become

The total radiative power emitted by spherical blackbody with radius R and temperature T is P. If the radius if doubled and the temperature is halved then the radiative power will be -

Radius of a calorimeter is r and depth is l . It is filled completely with water and then cooled from temperature theta in the surroundings at a temperature theta_(0) .If the emissive power of the surface of calorimeter is 1 and that of open surface of water is 0.5, then the ratio of rates of heat radiated by the surface of calorimeter and open surface of water will be –

The radiation power from a source at temperature T and2m away is 2W//m^(2) . If the temperature of the source increases by 100% the radiation power at a distance 4m from the source will increase by:

In troposhere, temperature varles linearly with elevation as T=T_(0)-ay, where T_(0) is the temperature at lthe earth's surface, then

NARAYNA-TRANSMISSION OF HEAT-C .U .Q
  1. In a room containing air, heat can go from one place to another

    Text Solution

    |

  2. The reflectance and emittance of a perfectly black body are rspectivel...

    Text Solution

    |

  3. Wien's displacement law fails at .

    Text Solution

    |

  4. A surface at temperature T(0)K receives power P by radiation from a sm...

    Text Solution

    |

  5. Two circular disc A and B with equal radii are blackened. They are hea...

    Text Solution

    |

  6. A solid at temperature T(1) is kept in an evacuated chamber at tempera...

    Text Solution

    |

  7. The thermal radiation emited by a body is proportional to T^(n) where ...

    Text Solution

    |

  8. A blackbody does not

    Text Solution

    |

  9. In summer, a mild wind is often found on the shore of a clam river. Th...

    Text Solution

    |

  10. A heater body emits radiation which has maximum intensity near the fre...

    Text Solution

    |

  11. Radiation is passing through a transparent medium then .

    Text Solution

    |

  12. The graph, shown in the adjacent diagram, represents the variation of ...

    Text Solution

    |

  13. In which of the following process, convection does not take place pri...

    Text Solution

    |

  14. If mass-energy equivalence is taken into account, when water is cooled...

    Text Solution

    |

  15. A sphare II A cube III A thin circular plate All made of the same mate...

    Text Solution

    |

  16. A beaker full of hot water is kept in a room and it cools from 80^(@)C...

    Text Solution

    |

  17. In the following which statement is correct .

    Text Solution

    |

  18. Infrared radiation is detected by

    Text Solution

    |

  19. Which of the following is the example of ideal black body?

    Text Solution

    |

  20. The earth radiates in the infra-red region of the spectrum. The spectr...

    Text Solution

    |