Home
Class 11
PHYSICS
A black body at 227^(@)C radiates heat a...

A black body at `227^(@)C` radiates heat at the rate of `7 cal cm^(-2) s^(-1)`. At a temperature of `727^(@)C`, the rate of heat radiated in the same unit will be

A

60

B

50

C

112

D

80

Text Solution

Verified by Experts

The correct Answer is:
C
`E prop T^4 implies (7)/(E_2)=((273+227)/(273+727))^4=(1)/(16)`
`implies E_2=112` cal `// cm^2`s
Promotional Banner

Topper's Solved these Questions

  • TRANSMISSION OF HEAT

    ERRORLESS|Exercise NCERT BASED QUESTIONS (Radiation (Newton.s Law of Cooling))|11 Videos

  • TRANSMISSION OF HEAT

    ERRORLESS|Exercise PAST YEARS QUESTIONS|21 Videos

  • TRANSMISSION OF HEAT

    ERRORLESS|Exercise NCERT BASED QUESTIONS (Radiation (Wien.s law))|13 Videos

  • THERMOMETRY, THERMAL EXPANSION AND CALORIMETRY

    ERRORLESS|Exercise ASSERTION & REASON|10 Videos

  • UNITS, DIMENSIONS AND MEASUREMENT

    ERRORLESS|Exercise ASSERTION & REASON |17 Videos

Similar Questions

Explore conceptually related problems

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 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 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 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 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 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

Two bodies hae temperatures as 227^(@)C and 727^(@)C ratio of heat radiated by them will be

ERRORLESS-TRANSMISSION OF HEAT -NCERT BASED QUESTIONS (Radiation (Stefan.s law))
  1. If the temperature of a hot body is increased by 50%, then the increas...

    Text Solution

    |

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

    Text Solution

    |

  3. The total energy radiated from a block body source at constant tempera...

    Text Solution

    |

  4. The top of an insulated cylindrical container is covered by a disc hav...

    Text Solution

    |

  5. The total energy of a black body radiation source is collected for fiv...

    Text Solution

    |

  6. The rate of radiation of a black body at 0° C is E . The rate of radia...

    Text Solution

    |

  7. A black body radiates energy at the rate of E W//m at a high temperat...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  11. Which of the following graphs correctly represents the relation betwe...

    Text Solution

    |

  12. If temperature of a black body increases from 7^(@)C to 287^(@)C , the...

    Text Solution

    |

  13. The tungsten filament of an electric lamp has a surface areaA and a po...

    Text Solution

    |

  14. Two spherical black bodies of radii r1 and r2 and with surface tempera...

    Text Solution

    |

  15. The total radiative power emitted by spherical blackbody with radius R...

    Text Solution

    |

  16. Assuming the sun to have a spherical outer surface of radius r radiati...

    Text Solution

    |

  17. The energy spectrum f a black body exhibits a maximum around a wavelen...

    Text Solution

    |

  18. A sphere a cube and thin circular plate, all made of the same material...

    Text Solution

    |

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

    Text Solution

    |

  20. A hollow copper sphere S and a hollow copper cube C, both of negligibl...

    Text Solution

    |