Home
Class 12
PHYSICS
If the angular momentum of a rotating bo...

If the angular momentum of a rotating body about an axis is increased by 10%. Its kinetic energy increases by

A

`20%`

B

`21%`

C

`10%`

D

`-21 %`

Text Solution

Verified by Experts

The correct Answer is:
B
`(L_(2)-L_(1))/(dt)=(1)/(2)((KE_(2)-KE_(1)))/(KE_(1))`
Promotional Banner

Topper's Solved these Questions

  • QUESTION PAPER - MH-CET 2018

    NIKITA PUBLICATION|Exercise MCQ|50 Videos

  • SEMICONDUCTORS

    NIKITA PUBLICATION|Exercise MCQS|350 Videos

Similar Questions

Explore conceptually related problems

If momentum is increased by 20%, then kinetic energy increases by

If the angular momentum of any rotating body increases by 200% , then the increase in its kinetic energy

The angular velocity of a body rotating about a given axis is doubled. Its kinetic energy

If momentum of an object is increased by 10%, then is kinetic energy will increase by

If angular momentum of a body increased by 200% its kinetic energy will increase by :

The momentum of a body is increased by 25%. The kinetic energy is increased by about

The angular momentum of rotating body is increased by 20% . What will be the increase in its rotational kinetic energy?

NIKITA PUBLICATION-ROTATIONAL MOTION -MULTIPLE CHOICE QUESTIONS
  1. If the variation of rotational kinetic energy E with the angular momen...

    Text Solution

    |

  2. A circular disc of mass 0.41 kg and radius 10 m rolls without slipping...

    Text Solution

    |

  3. If the angular momentum of a rotating body about an axis is increased ...

    Text Solution

    |

  4. If the kinetic energy of a rotating body about an axis is decreased by...

    Text Solution

    |

  5. A boy stands on a freely rotating platform with his arms extended. His...

    Text Solution

    |

  6. A rod of mass M and length l is suspended freely from its endandit...

    Text Solution

    |

  7. A hollow sphere rolls on a horozontal surface without slipping. Then ...

    Text Solution

    |

  8. A hollow cylinder open at both ends slides without rotating, and then ...

    Text Solution

    |

  9. The kinetic energy of a body rotating at 300 revolutions per minute is...

    Text Solution

    |

  10. The rotational kinetic energies of two flywheels are equal. If the rat...

    Text Solution

    |

  11. A uniform rod of length l is held vertically on a horizontal floor fix...

    Text Solution

    |

  12. The torque is a physical quantity which causes to produce

    Text Solution

    |

  13. The dimensional formula of torque is same as that of

    Text Solution

    |

  14. Force in linear motion is comparable to the quantity in rotatory motio...

    Text Solution

    |

  15. When same torque acts on two rotating rigid bodies to stop them, which...

    Text Solution

    |

  16. When a steady toqrue or couple acts on a body, the body

    Text Solution

    |

  17. The dimensions of torque are :

    Text Solution

    |

  18. If I, alpha and tau are the moment of inertia, angular acceleration an...

    Text Solution

    |

  19. The relation between the torque tau and angular momentum L of a body o...

    Text Solution

    |

  20. A fly wheel of M.I. 0.32 kg m^(2) is rotated steadily at 120 rad/s by ...

    Text Solution

    |