Home
Class 11
PHYSICS
A metal sphere of radius r and specific ...

A metal sphere of radius r and specific heat s is rotated about an axis passing through its centre at a speed of n rotation/s. It is suddenly stopped and `50%` of its energy is used in increasing its temperature. Then, the rise in temperature of the sphere is

A

`2/5 (pi^(2)n^(2)r^(2))/S`

B

`1/10 (pi^(2)n^(2))/(r^(2)S)`

C

`7/8 pir^(2)n^(2)S`

D

`(5(pin))/(14S)`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    AAKASH SERIES|Exercise EXERCISE - 2|58 Videos

  • THERMAL PROPERTIES OF MATTER

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE (LEVEL - II) PRACTICE SHEET (ADVANCED) Integer/Subjective Type Questions|2 Videos

  • THERMOMETRY

    AAKASH SERIES|Exercise Numerical Exercise (LEVEL- 1)|11 Videos
AAKASH SERIES-THERMODYNAMICS-EXERCISE - 3
  1. A lead bullet of initial temperature 27^(@)C and speed 'V' kmph pnetra...

    Text Solution

    |

  2. A drilling machine is used to drill a hole in a 10 kg metal block. Pow...

    Text Solution

    |

  3. A metal sphere of radius r and specific heat s is rotated about an axi...

    Text Solution

    |

  4. When 20 J of work was done on a gas, 40J of heat energy wasreleased. I...

    Text Solution

    |

  5. When 1 gm of water changes from liquid to vapour phase at constant pre...

    Text Solution

    |

  6. What amount of heat must be supplied to 2.0 × 10^(–2) kg of nitrogen (...

    Text Solution

    |

  7. 3 moles of a monoatomic gas requires 45 cal heat for 5^(@)C rise of te...

    Text Solution

    |

  8. A gaseous mixture consists of 16 g of helium and 16 g of oxygen. The r...

    Text Solution

    |

  9. If C(P) and C(V) denote the specific heats of nitrogen per unit mass a...

    Text Solution

    |

  10. At N.T.P. one mole of diatomic gas is compressed adiabatically to half...

    Text Solution

    |

  11. 5 moles of Hydrogen (gamma =(7)/(5)) initially at STP are compressed a...

    Text Solution

    |

  12. The relation between P and T for monoatomic gas during adiabatic proce...

    Text Solution

    |

  13. The equation of a certain gas can be written as T^(7//5)/P^(2//5)=" co...

    Text Solution

    |

  14. The tyre of a motor car contains air at 15^@C. If the temperature incr...

    Text Solution

    |

  15. A monoatomic gas, initially at temperature T(1), is enclosed in a cyli...

    Text Solution

    |

  16. Work of 146 KJ is performed in order to compress one kilo mole of gas...

    Text Solution

    |

  17. m grams of a gas of a molecular weight M is flowing in an isolated tub...

    Text Solution

    |

  18. Heat is supplied to a diatomic gas at constant pressure. The ratio of ...

    Text Solution

    |

  19. In the figure given two processes A and B are shown by which a thermod...

    Text Solution

    |

  20. The P-V diagram of a system undergoing thermodynamic transformation is...

    Text Solution

    |