Home
Class 12
PHYSICS
A magnet of magnetic 'M' is in the form ...

A magnet of magnetic `'M'` is in the form of a quadrant of a circle. If it is straightened, its new magnetic moment will be

A

`(Mpi)/sqrt2`

B

`(M)/sqrt2`

C

`(sqrt2M)/pi`

D

`(Mpi)/(2sqrt2)`

Text Solution

Verified by Experts

The correct Answer is:
D
`Mtheta=2M^(1)"sin"theta/2,theta=pi/2`
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 magnet of magnetic 'M' is in the form of a quadrant of a circle. If it is strightened, its new magnetic moment will be

A bar magnet of magnetic moment M is bent in the form of quadrant of circular arc . The new magnetic moment is

A bar magnet of moment 'M' is bent into a shape '5' . If the length of the each part is same, its new magnetic moment will be

A bar magnet of lenth l and magnetic dipole moment 'M' is bent in the form of an arc as shown in figure. The new magnetic dipole moment will be

A magnetised wire of magnetic moment 'M' and length 'l' is bent in the form of a semicircle of radius 'r' . The new magnetic moment is

A bar magnet of magnetic moment 'M' is bent in the form of an arc which makes angle 60^(0) . The percentage change in the magnetic moment is

NARAYNA-MAGNETISM AND MATTER-EXERCISE - 1 (H.W)
  1. A magnetised wire of magnetic moment 'M' and length 'l' is bent in the...

    Text Solution

    |

  2. A long thin magnet of moment M is bent into a semi circle. The decreas...

    Text Solution

    |

  3. A magnet of magnetic 'M' is in the form of a quadrant of a circle. If ...

    Text Solution

    |

  4. A bar magnet of moment 'M' is bent into a shape . If the length of the...

    Text Solution

    |

  5. Four magnets of magnetic moments M,2M,3M and 4M are arranged in the fo...

    Text Solution

    |

  6. Three identical bar magnets each of magnetic moment M are arranged in ...

    Text Solution

    |

  7. A torque of 2X10^(-4)Nm is required to hold a magnet at right angle to...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |