Home
Class 12
PHYSICS
A short bar magnet placed with its axis ...

A short bar magnet placed with its axis at `30^(@)` with a uniform external magnetic field of `0.16T` experience a torque of magnitude `0.032 Nm`. If the bar magnet is free to rotate, its potential energies when it is in stable and unstable equilibrium are respectively

A

`-0.064J, +0.0641J`

B

`-0.032J,+0.032J`

C

`+0.064J,-0.128J`

D

`0.032J,-0.032J`

Text Solution

Verified by Experts

The correct Answer is:
A
`P.E=-barM.barB`
Promotional Banner

Topper's Solved these Questions

  • MAGNETISM AND MATTER

    NARAYNA|Exercise EXERCISE - 2 (C.W)|42 Videos

  • MAGNETISM AND MATTER

    NARAYNA|Exercise EXERCISE - 2 (H.W)|24 Videos

  • MAGNETISM AND MATTER

    NARAYNA|Exercise EXERCISE - 1 (C.W)|52 Videos

  • MAGNETISM

    NARAYNA|Exercise LEVEL-II (H.W)|24 Videos

  • MOVING CHARGES AND MAGNETISM

    NARAYNA|Exercise EXERCISE - 4|20 Videos

Similar Questions

Explore conceptually related problems

A short bar magnet pleaced with its axis at 30^(@) with a uniform external magnetic field of 0.16 Tesla expriences a torque of magnitude 0.032 Joule. The magnetic moment of the bar magnet will be

A short bar magnet placed with its axis at 30^(@) with a uniform external magnetic field of 0.35 T experiences a torque of magnitude equal to 4.5xx10^(-2)Nm . The magnitude of magnetic moment of the given magnet is

A short magnet placed with its axis making an angle with a uniform external magnetic field of induction B experiences a torque (tau) . If the magnet is free to rotate, which orientation would correspong to its stable and unstable equilibrium.

A short bar magnet placed with its axis at 30^@ with a uniform external magnetic field of 0*25T experiences a torque of magnitude equal to 4*5xx10^-2J . What is the magnitude of magnetic moment of the magnet?

A short bar magnet placed with its axis at 30^(@) with an external field of 800 G experiences a torque of 0.016 Nm. (a)What is the magnetic moment of the magnet ?

NARAYNA-MAGNETISM AND MATTER-EXERCISE - 1 (H.W)
  1. A torque of 2X10^(-4)Nm is required to hold a magnet at right angle to...

    Text Solution

    |

  2. A bar magnet of 5 cm long having a pole strenght of 20 A.m. Is deflect...

    Text Solution

    |

  3. A short bar magnet placed with its axis at 30^(@) with a uniform exter...

    Text Solution

    |

  4. When a bar magnet is placed at 90^(@) to a uniform magnetic field, it ...

    Text Solution

    |

  5. A magnet of moment 4Am^(2) is kept suspended in a magnetic field of in...

    Text Solution

    |

  6. The work done in rotating the magnet form the direction of uniform fie...

    Text Solution

    |

  7. The work done in rotating a magnet of pole strength 1 A-m and length 1...

    Text Solution

    |

  8. The work done in turning a magnet normal to field direction from the d...

    Text Solution

    |

  9. A magnet is parallel to a uniform magnetic field. The work done in rot...

    Text Solution

    |

  10. The magnetic induction field strength at a distance 0.2 m on the axial...

    Text Solution

    |

  11. A short bar magnet of magnetic moment 1.2Am^(2) is placed in the magne...

    Text Solution

    |

  12. A very long magnet of pole strength 4 Am is placed vertically with its...

    Text Solution

    |

  13. A bar magnet of magnetic moment M and moment of inertial I is in the d...

    Text Solution

    |

  14. If the moments of inertia of two bar magnets are same, and if their ma...

    Text Solution

    |

  15. If the strength of the magnetic field is increased by 21% the frequenc...

    Text Solution

    |

  16. A bar magnet has a magnetic moment equal to 65xx10^(-5) wever x metre....

    Text Solution

    |

  17. Two bar magnets are placed in vibration magnetometer and allowed to vi...

    Text Solution

    |

  18. The magnetic induction and the intensity of magnetic field inside an i...

    Text Solution

    |

  19. The mass of an iron rod is 80 gm and its magnetic moment is 10 Am^(2)....

    Text Solution

    |

  20. A rod of cross sectional area 10cm^(2) is placed with its length paral...

    Text Solution

    |