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

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

Text Solution

Verified by Experts

From Eq., `tau = m B sin theta, theta =30^(@)`, hence `sin theta =1//2`.
Thus, `0.016 = m xx (800 xx 10^(-4)T) xx (1//2)`
`m = 160 xx 2//800 = 0.40 A m^(2)`
Promotional Banner

Topper's Solved these Questions

  • MAGNETISM AND MATTER

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise Very Short Answer Questions|20 Videos

  • MAGNETISM AND MATTER

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise Short Answer Questions|10 Videos

  • MAGNETISM AND MATTER

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise Additional Exercises|19 Videos

  • ELECTROSTATIC POTENTIAL AND CAPACITANCE

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise SAQs|4 Videos

  • MOVING CHARGES AND MAGNETISHM

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise ADDITIONAL EXERCISES|26 Videos

Similar Questions

Explore conceptually related problems

A short bar magnet placed with its axis at 30^@ with an extemal field of 800 G experiences a tunque of 0.016 Nm, (a) What is the magnetic moment of the magnet? (b) What is the work done in moving it from its most stable to most unstable position? (c) The bar magnet is replaced by a solenoid of cros B-sectional area 2 xx 10^(-4) m^(2) and 1000 tums, but of the same magnetic moment. Determine the current flowing through the solenoid.

A short bar magnet placed with its axis at 30^(@) with an external field of 800 G experiences a torque of 0.016 Nm. What is the work done in moving it from its most stable to most unstable position ?

A short bar magnet placed with its axis at 30^(@) with an external field of 800 G experiences a torque of 0.016 Nm. The bar magnet is replaced by a solenoid of cross-sectional area 2 xx 10^(-4) m^(2) and 1000 turns, but of the same magnetic moment. Determine the current flowing through the solenoid.

A short bar magnet placed with its axis at 30^(@) with a uniform external magnetic field of 0.25 T experiences a torque of magnitude equal to 4.5 xx 10^(-2)J . What is the magnitude of magnetic moment of the magnet ?

A small bar magnet experiences a torque of 0.016 Nm when placed with its axis at 30° with an external field of 0.04 T. If the bar magnet is replaced by a solenoid of cross-sectional area of 1 cm^2 and 1000 turns but having the same magnetic moment as that of bar magnet, then the current flowing through the solenoid is

A bar magnet placed in a uniform magnetic field making an angle theta with the field experiences a torque. If the angle made by the magnet with the field is doubled, the torque experienced by the magnet increases by 41.4% . The initial angle made by the magnet with the magnetic field is

VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-MAGNETISM AND MATTER-Textual Examples
  1. In Fig, the magnetic needle has magnetic moment 6.7 xx 10^(-2) Am^(2) ...

    Text Solution

    |

  2. A short bar magnet placed with its axis at 30^(@) with an external fie...

    Text Solution

    |

  3. A short bar magnet placed with its axis at 30^(@) with an external fie...

    Text Solution

    |

  4. A short bar magnet placed with its axis at 30^(@) with an external fie...

    Text Solution

    |

  5. What happens if a bar magnet is cut into two pieces : (i) transverse t...

    Text Solution

    |

  6. A magnetised needle in a uniform magnetic field experiences a torque b...

    Text Solution

    |

  7. Must every magnetic configuration have a north pole and a south pole ?...

    Text Solution

    |

  8. Two identical looking iron bars A and B are given, one of which is def...

    Text Solution

    |

  9. Figure shows a small magnetised needle P placed at a point O. The arro...

    Text Solution

    |

  10. Figure shows a small magnetised needle P placed at a point O. The arro...

    Text Solution

    |

  11. Figure shows a small magnetised needle P placed at a point O. The arro...

    Text Solution

    |

  12. Many of the diagrams given in Fig. show magnetic field lines (thick li...

    Text Solution

    |

  13. Many of the diagrams given in Fig. show magnetic field lines (thick li...

    Text Solution

    |

  14. Many of the diagrams given in Fig. show magnetic field lines (thick li...

    Text Solution

    |

  15. Many of the diagrams given in Fig. show magnetic field lines (thick li...

    Text Solution

    |

  16. Many of the diagrams given in Fig. show magnetic field lines (thick li...

    Text Solution

    |

  17. Many of the diagrams given in Fig. show magnetic field lines (thick li...

    Text Solution

    |

  18. Many of the diagrams given in Fig. show magnetic field lines (thick li...

    Text Solution

    |

  19. Magnetic field lines show the direction (at every point) along which a...

    Text Solution

    |

  20. Magnetic field lines can be entirely confined within the core of a tor...

    Text Solution

    |