Home
Class 11
PHYSICS
Radius of a shere is R density is d and ...

Radius of a shere is `R` density is d and specific heat is s, Is is heated and then allowed to cool Its rate of decrease of temperature will be proportional to .

A

`Rds`

B

`1//Rds`

C

`1//R^(2)ds`

D

`R^(2)ds`

Text Solution

Verified by Experts

The correct Answer is:
B
`(Deltatheta)/(Deltat)=((eAsigma)/(ms))T^(4)`
Promotional Banner

Topper's Solved these Questions

  • TRANSMISSION OF HEAT

    NARAYNA|Exercise LEVEL-II(C.W)|27 Videos

  • TRANSMISSION OF HEAT

    NARAYNA|Exercise SINGLE ANSWER QUESTIONS|68 Videos

  • THERMODYNAMICS

    NARAYNA|Exercise Exercise|187 Videos

  • UNITS AND MEASUREMENTS

    NARAYNA|Exercise STATEMENT TYPE QUESTION|23 Videos

Similar Questions

Explore conceptually related problems

A very thin metallic shell of radius r is heated to temperature T and then allowed to cool. The rate of cooling of shell is proportional to

A sphere of radius r, density, rho and specific heat s is heated to temperature theta and then cooled in an enclosure at temperature theta_(0) . How , the rate of fall of temperature is related with r, rho and s?

The specific heat of an ideal gas is proportional to

The specific heat of metals at low temperature is

According to ‘Newton’s Law of cooling’, the rate of cooling of a body is proportional to the

Amount of heat radiations emitted by a solid sphere of radius r at any temperatures is proportional to the following .?

NARAYNA-TRANSMISSION OF HEAT-LEVEL-I(H.W)
  1. In the steady state the two ends of a meter rod are at 30^(@)C and 20^...

    Text Solution

    |

  2. A body of length 1 m having cross sectional area 0.75 m^(2) has heat f...

    Text Solution

    |

  3. A 3cm cube of iron one face at 100^(@)C and the other in a block of ic...

    Text Solution

    |

  4. The heat is flowing through two cylinderical rods of same material. Th...

    Text Solution

    |

  5. One end of a cylindrical rod is kept in steam chamber and the other en...

    Text Solution

    |

  6. The wavelength of maximum energy released during an atomic axplosion w...

    Text Solution

    |

  7. What will be the ratio of temperatures of sun and moon if the waveleng...

    Text Solution

    |

  8. The rate of radiation from a black body at 1^(@)C is E The rate of rad...

    Text Solution

    |

  9. Two bodies of same shape, same size and same radiating power have emis...

    Text Solution

    |

  10. Two spheres have radii 1m , 2m are at same temperatures, have emissivi...

    Text Solution

    |

  11. The radiant power of a furnace of surface area of 0.6m^(2) is 34.2KW T...

    Text Solution

    |

  12. How many watt of energy is required to keep a black body in the form o...

    Text Solution

    |

  13. Two spheres of the same materical have radii 1m and 4m and temperature...

    Text Solution

    |

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

    Text Solution

    |

  15. Amount of heat radiations emitted by a solid sphere of radius r at any...

    Text Solution

    |

  16. The rates of coling of a body at tempeerature 100^(@)C and 80^(@)C are...

    Text Solution

    |

  17. A vessel full of hot water is kept in a room and it cools from 80^(@)C...

    Text Solution

    |

  18. Radius of a shere is R density is d and specific heat is s, Is is heat...

    Text Solution

    |

  19. If the rate of emission of radiation by a body at temperature TK is E ...

    Text Solution

    |