Home
Class 11
PHYSICS
Calculate the maximum amount of heat whi...

Calculate the maximum amount of heat which may be lost per second by radiation by a sphere 14cm in diameter at a temperature of `227^(@)C`, when placed in an enclosure at `27^(@)C`. Given Stefan's constant =`5.7 xx 10^(-8)Wm^(-2)K^(-4)`.

Text Solution

AI Generated Solution

To calculate the maximum amount of heat lost per second by radiation from a sphere, we can use Stefan-Boltzmann Law. The formula for the power radiated by a black body is given by: \[ P = \sigma A (T^4 - T_0^4) \] where: - \( P \) is the power (heat lost per second), ...
Promotional Banner

Topper's Solved these Questions

  • PROPERTIES OF BULK MATTER

    PRADEEP|Exercise Conceptual Problems|103 Videos

  • PROPERTIES OF BULK MATTER

    PRADEEP|Exercise Advanced problems for competitions|21 Videos

  • PROPERTIES OF BULK MATTER

    PRADEEP|Exercise Long Answer questions|33 Videos

  • PHYSICAL WORLD AND MEASUREMENT

    PRADEEP|Exercise Competiton Focus Jee Medical Entrance|18 Videos

  • RAY OPTICS

    PRADEEP|Exercise Problem For Practice(a)|25 Videos

Similar Questions

Explore conceptually related problems

A sphere of radius 15 cm is at a temperature of 215^@C . Find the maximum amount of heat which may be lost per second by radiation when the sphere is placed in an enclosure at 25^@C . Take, sigma = 5.67 xx 10^(-8) Wm^(-2) K^4

Calculate the amount of heat radiated per second by a body of surface are 10 cm^(2) kept in thermal equilibrium in a roomat temperature 27^(@)C . The emissivity of the surface = 0.80 and Stefan's constant sigma ~= 6 xx 10^(-8) W//m^(2) K^(4)

A room heater is made up of thin wall tubes of copper, each 1.0 m long and 4.0 cm in diameter. Hot water aet 77^(@)C circulates constantlyh through the tubes. Calculate the amount of heat radiated per second in a room where the average temperature is 27^(@)C . The emissivity of copper =0.8 and Stefan's contant =5.67xx10^(-8)Wm^(-2)K^(-1)

A body which has a surface area 5.0 cm^(2) and a temperature of 727^(@)C radiater 300 J energy each minute. What is its emissivity? Stefan's Boltzmann's constat is 5.76 xx 10^(-8) Wm^(-2)K^(-4) .

A body having a surface area of 50cm^2 radiates 300J of energy per minute at a temperature of 727^(@)C . The emissivity of the body is ( Stefan's constant =5.67xx10^(-8)W//m^2K^4 )

A body which has a surface area 5.00 cm^(2) and a temperature of 727^(@)C radiated 300 j of energy each minute. What is the emissivity of body? Steafan's constant =5.67xx10^(-8) Wm^(-2) K^(-4) .

Calculate the temperature at which a perfect black body radiates at the rate of 1 W cm^(-2) , value of Stefan's constant, sigma = 5.67 xx 10^(-8) W m^(-2)K^(-4)

Calculate the temperature at which a perfect black body radiates at the rate of 1 W cm^(-2) , value of Stefan's constant, sigma = 5.67 xx 10^(-5) W m^(-2) K^(-8)

Calculate the amount of heat radiated per second by a body of surface area 12cm^(2) kept in thermal equilibrium in a room at temperature 20^(@)C The emissivity of the surface =0.80 and sigma=6.0xx10^(-s)Wm^(-2)K^(-4) .

A hot body at 800^@C is radiating 500 J of energy per minute. Calculate the surface area of the body if emissivity is 0.23 and Stefan's constant is 5.67 xx 10^(-8) Wm^(-2) K^(.-4) .

PRADEEP-PROPERTIES OF BULK MATTER-Solved Examples
  1. An iron bar (L(1) = 0.1 m, A(1) = 0.02 m^(2) , K(1) = 79 Wm^(-1) K^(-1...

    Text Solution

    |

  2. One end of a copper rod of uniform cross-section and length 150 cm is ...

    Text Solution

    |

  3. Three bars of equal lengths and equal area of cross-section are connec...

    Text Solution

    |

  4. An electric heater is used in a room of total wall area 137m^(2) to ma...

    Text Solution

    |

  5. A body initially at 64^(@)C cools to 52^(@)C in 5 minutes. The tempera...

    Text Solution

    |

  6. A body initially at 80^(@)C cools to 64^(@)C in 5 minutes and to 52^(@...

    Text Solution

    |

  7. A pan filled with hot food cools from 94^(@)C to 86^(@)C in 2 minutes ...

    Text Solution

    |

  8. A body cools in 7 minutes from 60^(@)C to 40^(@)C. What will be its te...

    Text Solution

    |

  9. Calculate the temperature (in K) at which a perfect black body radiate...

    Text Solution

    |

  10. The temperature of a body in increased from 27^(@)C to 127^(@)C. By wh...

    Text Solution

    |

  11. Due to change in main voltage, the temperature of an electric bulb ris...

    Text Solution

    |

  12. Determine the surface area of the filament of a 100W incandescent lamp...

    Text Solution

    |

  13. An indirectly heated filament is radiating maximum energy of wavelengt...

    Text Solution

    |

  14. A room heater is made of 10 polished thin walled tubes of copper, each...

    Text Solution

    |

  15. Calculate the maximum amount of heat which may be lost per second by r...

    Text Solution

    |

  16. A man, the surface area of whose skin is 2m^(2) , is sitting in a room...

    Text Solution

    |

  17. Light from the moon, is found to have a peak (or wevelenght of maximum...

    Text Solution

    |

  18. The surface temperature of the hot body is 1127^(@)C find the waveleng...

    Text Solution

    |

  19. A layer of ice 29 cm thick has formed on a pond. The temperature of ai...

    Text Solution

    |

  20. A room heater is made of 10 polished thin walled tubes of copper, each...

    Text Solution

    |