Home
Class 11
PHYSICS
The angular momentum of a wheel changes ...

The angular momentum of a wheel changes from 2L to 5L in 3 seconds. What will be the magnitude of torque acting on it?

A

`(L)/(5)`

B

`(L)/(2)`

C

`(L)/(3)`

D

L

Text Solution

Verified by Experts

The correct Answer is:
D
`tau=(dL)/(dt)=(L_(2)-L_(1))/(3)=(5L-2L)/(3)=(3L)/(3)=L`
Promotional Banner

Topper's Solved these Questions

  • SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

    KUMAR PRAKASHAN|Exercise SECTION-F QUESTIONS FROM MODULE|22 Videos

  • SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

    KUMAR PRAKASHAN|Exercise SECTION-F (SECTION-A) QUESTIONS PAPER|6 Videos

  • SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

    KUMAR PRAKASHAN|Exercise SECTION-D NCERT EXEMPLAR SOLUTIONS (LONG ANSWER TYPE QUESTIONS)|6 Videos

  • QUESTIONS ASKED IN JEE - 2020

    KUMAR PRAKASHAN|Exercise Question|16 Videos

  • THERMAL PROPERTIES OF MATTER

    KUMAR PRAKASHAN|Exercise Question Paper (Section - D) (Answer following in brief :) Each carry 4 marks|1 Videos

Similar Questions

Explore conceptually related problems

The angular speed of a motor wheel is increased from 1200 rpm to 3120 rpm in 16 seconds. (i) What is its angular acceleration, assuming the acceleration to be uniform? (ii) How many revolutions does the engine make during this time?

The angular speed of a motor wheel is increased from 600 rpm to 1560 rpm in 8 seconds. (i) What is its angular acceleration, assuming the acceleration to be uniform? (ii) How many revolutions does the engine make during this time?

A simple pendulum of mass m and length L is held in horizontal position. If it is released from this position, then find the angular momentum of the bob about the point of suspension when it is vertically below the point of suspension.

If we change the axis of rotation does the magnitude of angular momentum change?

An electric dipole with dipole moment 4 xx 10^(-9) Cm is aligned at 30° with the direction of a uniform electric field of magnitude 5 xx 10^4 NC^(-1) . Calculate the magnitude of the torque acting on the dipole.

What will the angular momentum in fourth orbit, if L is the angular momentum of the electron in the second orbit of hydrogen atom?

The atom of hydrogen absorbs 12.75 eV of energy in ground state. Then what will be the change in orbital angular momentum of the electron in it.

KUMAR PRAKASHAN-SYSTEMS OF PARTICLES AND ROTATIONAL MOTION-SECTION-E MULTIPLE CHOICE QUESTIONS
  1. A solid sphere rolls without slipping on an inclined plane of angle th...

    Text Solution

    |

  2. What is moment of inertia in terms of angular momentum (L) and kinetic...

    Text Solution

    |

  3. The angular momentum of a wheel changes from 2L to 5L in 3 seconds. Wh...

    Text Solution

    |

  4. If the angular momentum of the body is increased by 50%, its rotationa...

    Text Solution

    |

  5. A rigid body is rotating about fix axis. P and Q are its particles. Wh...

    Text Solution

    |

  6. A bird of 3 kg is flying with a constant velocity of (2hati-4hatj)m//s...

    Text Solution

    |

  7. The centre of mass of a ring of uniform mass distribution lies ………….

    Text Solution

    |

  8. A bomb of mass 60 kg moving uniformly with a velocity of 10m/s explode...

    Text Solution

    |

  9. The moment of inertia of a disc of uniform density about on axis coinc...

    Text Solution

    |

  10. A wheel initially at rest acquires an angular velocity of 128 rad s^(-...

    Text Solution

    |

  11. A shell following a parabolic path explodes some where in its flight. ...

    Text Solution

    |

  12. A bus of 2500 kg is moving on a straight road with a speed of 40 km/h....

    Text Solution

    |

  13. In cricket match, a bowler throws a ball of 0.5 kg with a speed of 20 ...

    Text Solution

    |

  14. If the external force acting on a system of particle is zero then …………...

    Text Solution

    |

  15. The centre of mass of a rigid body ………… the rigid body.

    Text Solution

    |

  16. Angular momentum of the particle rotating with a centripetal force is ...

    Text Solution

    |

  17. The radius of gyration of a ring about the tangent perpendicular to it...

    Text Solution

    |

  18. Kinetic energy and angular velocity of a rigid body are E and omega re...

    Text Solution

    |

  19. A fly wheel starts rotating from rest and acquires rotational speed of...

    Text Solution

    |

  20. Two identical spheres are rolling down the slope. One is solid and oth...

    Text Solution

    |