Home
Class 11
PHYSICS
Star A has radius r surface temperature ...

Star A has radius r surface temperature T while star B has radius 4 r and surface temperature T /2. The ratio of the power of two starts, P A : P B is

A

`16 : 1`

B

`1 : 16`

C

`1 : 1`

D

`1 : 4`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • TRANSMISSION OF HEAT

    ERRORLESS |Exercise Radiation (Newton s Law of Cooling)|37 Videos

  • TRANSMISSION OF HEAT

    ERRORLESS |Exercise Critical Thinking|36 Videos

  • TRANSMISSION OF HEAT

    ERRORLESS |Exercise Radiation (Wein s law)|30 Videos

  • THERMOMETRY, THERMAL EXPANSION AND CALORIMETRY

    ERRORLESS |Exercise Self Evaluation Test|15 Videos

  • UNITS, DIMENSION & MEASUREMENTS

    ERRORLESS |Exercise All Questions|333 Videos

Similar Questions

Explore conceptually related problems

The radiation emitted by a star A is 1000 times that of the sun. If the surface temperature of the sun and star A are 6000 K and 2000 K respectively. The ratio of the radii of the star A and the sun is:

The radiation emitted by a star A is 10,000 times that of the sun. If the surface temperatures of the sun and the star A are 8000 K and 2000 K respectively. The ratio of the radii of the star A and the sun is

The radiation emitted by a star A is 10,000 times that of the sun. If the surface temperatures of the sun and the star A are 6000 K and 2000 K respectively, the ratio of the radii of the star A and the sun is

The radiation power emitted by a star "A" is 1000 times that of the sun.If the surface temperatures of the sun and star "A" are "6000K and "2000K" respectively,the ratio of the radii of the star "A" and the sun is

The luminousity of a star is 10,000 times that of the sun and its surface temperature is 3000K . Assuming the surface of temperature of the sun to be 6000K , compare the radius of the star with that of the sun.

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

The radiation emitted by a star A is 100 times that of the sun. If the surface temperatures of the sun and the star are 6000 K and 2000 K respectively, then the ratio of the radii of the star and the sun is

Excess pressure inside a soap bubble of radius r and surface tension T is

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 -

ERRORLESS -TRANSMISSION OF HEAT-Radiation (Stefan s law)
  1. Two spheres of same material have radius 1 m and 4 m and temperature 4...

    Text Solution

    |

  2. The radiation emitted by a star A is 10,000 times that of the sun. If ...

    Text Solution

    |

  3. A black body radiates at the of W watts at a temperture T. If the temp...

    Text Solution

    |

  4. Star A has radius r surface temperature T while star B has radius 4 r ...

    Text Solution

    |

  5. Suppose the sun expands so that its radius becomes 100 times its prese...

    Text Solution

    |

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

    Text Solution

    |

  7. At 127^(@)C radiates energy is 2.7 xx 10 J//s. At what temperature rad...

    Text Solution

    |

  8. If the initial temperatures of metallic sphere and disc, of the same m...

    Text Solution

    |

  9. A black body radiates energy at the rate of 1 xx 10 J // s xx m at tem...

    Text Solution

    |

  10. The temperature of a body is increased from –73°C to 327°C. Then the r...

    Text Solution

    |

  11. If the temperature of the body is increased by 10%, the percentage inc...

    Text Solution

    |

  12. If the sun's surface radiates heat at 6.3 xx 10^(7) Wm^(-2). Calculate...

    Text Solution

    |

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

    Text Solution

    |

  14. The value of Stefan's constant is

    Text Solution

    |

  15. The rate of cooling at 600 K, if surrounding temperature is 300 K is R...

    Text Solution

    |

  16. A blackbody of surface area 10cm^(2) is heated to 127^(@)C and is sus...

    Text Solution

    |

  17. Two identical objects A and B are at temperature T(A) and T(B) respect...

    Text Solution

    |

  18. When a body has the same temperature as that of its surroundings

    Text Solution

    |

  19. The ratio of radiant energies radiated per unit surface area by two bo...

    Text Solution

    |

  20. The spectral energy distribution of star is maximum at twice temperatu...

    Text Solution

    |