Home
Class 11
PHYSICS
A spherical black body with a radius of ...

A spherical black body with a radius of `12` cm radiates `450` watt power at `500 K`. if the radius were halved and the temperature doubled, the power radiated in watt would be

A

225

B

450

C

900

D

1800

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • COMMUNICATION SYSTEM

    DC PANDEY ENGLISH|Exercise Only One Option is Correct|27 Videos

  • ELASTICITY

    DC PANDEY ENGLISH|Exercise Medical entrances s gallery|21 Videos

Similar Questions

Explore conceptually related problems

A spherical black body with a radius of 12 cm radiates 450 W power at 500 K. If the radius were halved and the temperature doubled, the power radiated in watt would be (a)225 (b)450 (c) 900 (d)1800

A spherical black body with radius 12 cm radiates 450 w power at 500 K. If the radius is halved and the temperature doubled, the power radiated in watts would be

A spherical black body with radius 12 cm radiates 640 w power at 500 K. If the radius is halved and the temperature doubled, the power radiated in watts would be

A spherical body of radius 10cm radiates 300 W at 227°C . If the radius is doubled and temperature is remain same, the power radiated will be

A spherical black body of radius n radiates power p and its rate of cooling is R. then.

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 .

A black body, at temperature T K emits radiation at the rate of 81 W/m2. It the temperature falls to t=T/3 K. then the new rate of thermal radiation will be

A black body at a temperature of 227^(@)C radiates heat energy at the rate of 5 cal/ cm^(2) -sec. At a temperature of 727^(@)C , the rate of heat radiated per unit area in cal/ cm^(2) -sec will be

A black body radiates energy at the rate of E W//m at a high temperature TK . When the temperature is reduced to (T)/(2)K , the radiant energy will b

A black body emits radiations of maximum intensity at a wavelength of Å 5000 , when the temperature of the body is 1227^(@)C . If the temperature of the body is increased by 1000^(@)C , the maximum intensity of emitted radiation would be observed at

DC PANDEY ENGLISH-CURRENT ELECTRICITY-All Questions
  1. A cylinder of radius R made of a material of thermal conductivity K1 i...

    Text Solution

    |

  2. The temperature of an ideal gas is increased from 120 K to 480 K. If a...

    Text Solution

    |

  3. A spherical black body with a radius of 12 cm radiates 450 watt power ...

    Text Solution

    |

  4. A faulty thermometer reads 5^@ C melting ice and 99^@ C in steam. Find...

    Text Solution

    |

  5. The efficiency of a Carnot's engine at a particular source and sink te...

    Text Solution

    |

  6. What must be the lengths of steel and copper rods at 0^(@)C for the di...

    Text Solution

    |

  7. Earth receives 1400 W//m^2 of solar power. If all the solar energy fal...

    Text Solution

    |

  8. A thin rod of negligible mass and a cross-section of 2 xx 10^(-6) m^(2...

    Text Solution

    |

  9. A gas at the temperature 250 K is contained in a closed vessel. If the...

    Text Solution

    |

  10. A certain amount of ideal monoatomic gas undergoes a process given by ...

    Text Solution

    |

  11. A rod of length 1000 mm and co-efficient of linear expansion alpha = 1...

    Text Solution

    |

  12. One mole of a diatomic ideal gas undergoes a cyclic process ABC as sho...

    Text Solution

    |

  13. A copper block of mass 2.5 kg is heated in a furnace to a temperature ...

    Text Solution

    |

  14. Consider isothermal expansion of 0.5 mole of an ideal gas when Q amoun...

    Text Solution

    |

  15. A brass boiler has a base area of 0.15m^2 and thickness 1.0 cm it boil...

    Text Solution

    |

  16. A monoatomic ideal gas is used in a carnot engine as the working subst...

    Text Solution

    |

  17. Two adiabatic containers have volumes V(1) and V(2) respectively. The ...

    Text Solution

    |

  18. A uniform metallic disc of radius r and mass m is spinning with angula...

    Text Solution

    |

  19. Three identical rods AB, CD and PQ are joined as shown. P and Q are mi...

    Text Solution

    |

  20. When the temprature of a gas filled in a closed vessel is increased by...

    Text Solution

    |