Home
Class 11
PHYSICS
A sphere a cube and thin circular plate,...

A sphere a cube and thin circular plate, all made of the same material and having the same mass are initially heated to a temperature of `1000^(@)C`. Which one of these will cool first?

A

Plate

B

Sphere

C

Cube

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
Rate of cooling ­-
`(DeltaQ)/(t)=(A epsilon sigma (T^4-T_0^4))/(mc)` , as `(DeltaQ)/(t) prop A`
Area of plate is largest, it will cool fastest.
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 sphere, a cube and a thin circular plate all made of the same material and having the same mass are initially heated to a temperature of 300^(@)C . Which one of these cools faster ?

A sphere, a cube and a thin circular plate, all of same material and same mass are initially heated to same high temperture.

A sphere, a cube and a thin circular plate, all made of the same mass and finish are heated to a temperature of 200^(@)C . Which of these objects will cool slowest, when left in air at room temperature?

A sphere a cube and a thin circular plate all of same material having same mass are initially heated to 200^(@)C . Which of these will cool fastest?

A sphare II A cube III A thin circular plate All made of the same material having the same mass are initially heated to 200^(@)C Identify the order in which the objects cool faster when left in air room temperature ? .

A sphere, a cube and a thin circular plate, all having the same mass and made of the same material are heated to the same temperature and them allowed to cool. Which of them cools fastest ?

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

    |