Home
Class 12
PHYSICS
Four spheres A, B, C and D of different ...

Four spheres A, B, C and D of different metals but all same radius are kept at same temperature. The ratio all their densities and specific heats are `2:3:5:1` and `3:6:2:4`. Which sphere will show the fastest rate all cooling (initially) (assume black body radiation for all of them)

Text Solution

Verified by Experts

The correct Answer is:
`[B]`
Promotional Banner

Topper's Solved these Questions

  • HEAT TRANSFER

    PHYSICS GALAXY - ASHISH ARORA|Exercise Advance MCQs with One or More Option Correct|20 Videos

  • HEAT AND THERMAL EXPANSION

    PHYSICS GALAXY - ASHISH ARORA|Exercise UNSOLVED NUMRICAL PROBLEMS FOR PREPARATION OF NSEP, INPhO & IPhO|82 Videos

  • Kinetic Theory of Gases and Gas Laws

    PHYSICS GALAXY - ASHISH ARORA|Exercise Unsolved Numerical Problems for Preparation of NSEP, INPhO & IPhO|64 Videos

Similar Questions

Explore conceptually related problems

Two spheres made of same material have radii in the ratio 1: 2 Both are at same temperature. Ratio of heat radiation energy emitted per second by them is

Two spheres of same material and radius r and 2r are heated to same temperature and are kept in identical surroundings, ratio of their rate of loss of heat is

Three black bodies A, B and C in the form of cubes of sides in the ratio 3 : 4 : 5 are kept at the same high temperature. The ratio of the quantity of heat lost per second by A, B and C will be

Assertion : A solid sphere and a hollow sphere of same material and same radius are kept at same temperature in atmosphere. Rate of cooling of hollow sphere will be more. Reason : If all other conditions are same, then rate of cooling is inversely proportional to the mass of body.

A circular plate, a cube and a sphere, all made up of same material and having the same mass, are heated to 300^@C and left in a room. Which of them will have the slowest rate of cooling?

Two spheres A and B have diameters in the ratio 1:2 , densities in the ratio 2:1 and specific heat in the ratio 1:3 . Find the ratio of their thermal capacities.

The ratio of specific heats of two spheres is 2:3, radii 1:2, emissivity 3:1 and density 1:1. Initially, they are kept at same temperatures in atmosphere. Which sphere will cool at a faster rate initially.

Four bodies of specific heats s_1,s_2,s_3 and s_4 are cooled in the same surroundings. If s_2 gt s_2 gt s_3 gt s_4 , and temperature of all the four bodies is the same, then the specific heat of body which cools fastest, will be –

PHYSICS GALAXY - ASHISH ARORA-HEAT TRANSFER -Unsolved Numerical Problems for Preparation of NSEP,INPhO&IPhO
  1. A uniform copper rod 50 cm long is insulated on the sides, and has its...

    Text Solution

    |

  2. Find the temperature distribution in a substance palced between two pa...

    Text Solution

    |

  3. Four spheres A, B, C and D of different metals but all same radius are...

    Text Solution

    |

  4. A closed cubical box made of perfectly insulating material has walls o...

    Text Solution

    |

  5. The solar energy received by the Earth persquare metre per minute is 8...

    Text Solution

    |

  6. Two solid spheres are heated to the same temperature allowed to cool u...

    Text Solution

    |

  7. A metal block with a heater in it is placed in a room at temperature 2...

    Text Solution

    |

  8. In a cylindrical metallic vessel some water is taken and is put on a b...

    Text Solution

    |

  9. A system S receives heat continuously from an electric heater of power...

    Text Solution

    |

  10. In winters ice forms on the surface of a lake. Due to abnormal expansi...

    Text Solution

    |

  11. Two spheres of the same material have radii 1m and 4m and temperature...

    Text Solution

    |

  12. The temperature of the tungsten filament of a 40 watt lamp is 1655^(@)...

    Text Solution

    |

  13. A cubical tank of water of volume 1m^(3) is kept at a constant tempera...

    Text Solution

    |

  14. Find the temperature distribution in the space between two coaxial cyl...

    Text Solution

    |

  15. A cube a = 3.0 cm on each side radiates energy at the rate of P = 20 J...

    Text Solution

    |

  16. Solve the foregoing problem for the case of two concentric spheres of ...

    Text Solution

    |

  17. A long tungsten heater wire is rated at 3 kWm^(-1) and is 5.0 xx 10^(-...

    Text Solution

    |

  18. A constant electric current flows along a uniform wire with cross-sect...

    Text Solution

    |

  19. An iron boiler with walls 1.25 cm thick contains water at atmospheric ...

    Text Solution

    |

  20. A thin wire of length l=50cm and area of cross-section S=3xx10^(-4)m^(...

    Text Solution

    |