Home
Class 12
PHYSICS
A hollow copper sphere & a hollow copper...

A hollow copper sphere & a hollow copper cube of same surface area & negligible thickness , are filled with warm water of same temperature and placed in an enclosure of constant temperature a few degrees below that of the bodies. Then in the beginning:-

A

the rate of energy lost by the sphere is greater than that by the cube

B

the rate of energy lost by the two are equal

C

the rate of energy lost by the sphere is less than that by the cube

D

the rate of fall of temperature for sphere is less than that for the cube.

Text Solution

Verified by Experts

The correct Answer is:
B, D
Promotional Banner

Topper's Solved these Questions

  • MASTER PRACTICE PROBLEM

    BANSAL|Exercise Subjective|107 Videos

  • MASTER PRACTICE PROBLEM

    BANSAL|Exercise Additional topic|70 Videos

  • MASTER PRACTICE PROBLEM

    BANSAL|Exercise Reasoning|75 Videos

  • FLUID MECHANICS

    BANSAL|Exercise PYQS AIEEE|10 Videos

  • SEMICONDUCTORS

    BANSAL|Exercise CBSE Question|32 Videos

Similar Questions

Explore conceptually related problems

A hollow copper sphere S and a hollow copper cube C, both of negligible thin walls of same area, are filled with water at 90° C and allowed to cool in the same environment. The graph that correctly represents their cooling is

Two sphere of same radius and material, one solid and one hollow are heated to same temperature and kept in a chamber maintained at lower temperature at t = 0 -

A solid sphere and a hollow sphere of the same material and size are heated to the same temperature and allowed to cool in the same surroundings. If the temperature difference between the surroundings and each sphere is T, then :

A solid sphere and a hollow sphere of the same material and of equal radii are heated to the same temperature.

A solid sphere and a hollow sphere of the same material and of equal radii are heated to the same temperature

BANSAL-MASTER PRACTICE PROBLEM-Multiple objective
  1. Which of the following actions would make a pulse travel faster along ...

    Text Solution

    |

  2. A wave equation which gives the displacement along the y direction is ...

    Text Solution

    |

  3. A hollow copper sphere & a hollow copper cube of same surface area & n...

    Text Solution

    |

  4. A thin cylindrical metal rod is bent into a ring with a small gap as s...

    Text Solution

    |

  5. The extension produced in a wire of length L when under tension T is l...

    Text Solution

    |

  6. A unifom cylinder of steel of mass M radius R is placed on frictionles...

    Text Solution

    |

  7. A U-tube filled with a liquid of volumetric expansion coefficient 10^(...

    Text Solution

    |

  8. Due to thermal expansion, with rise in temperature

    Text Solution

    |

  9. Which of the following statements is // are correct?

    Text Solution

    |

  10. One mole of monoatomic gas is taken through cyclic process shown below...

    Text Solution

    |

  11. A metal cylinder of mass 0.5 kg is heated electrically by a 12 W heate...

    Text Solution

    |

  12. Four identical rods which have thermally insulated lateral surfaces ar...

    Text Solution

    |

  13. Which of the following quantities is the same for all ideal gases at t...

    Text Solution

    |

  14. Figure represents on the log-log scale pressure (P) dependence of adia...

    Text Solution

    |

  15. Two moles of O(2)(gamma=7/5) at temperature T(0) and 3 moles of CO(2)(...

    Text Solution

    |

  16. In the given cyclic process from c to b 40 J heat is exchanged from b ...

    Text Solution

    |

  17. An insulating cylinder contains equal volumes of He and O(2) separated...

    Text Solution

    |

  18. The following figure-I .427 shows a block of mass m suspended from a f...

    Text Solution

    |

  19. Two large thin conducting plates with a small gap in between are place...

    Text Solution

    |

  20. A fixed point charge Q is at origin At t=0 a charge q with m is at x=a...

    Text Solution

    |