Home
Class 12
PHYSICS
The couple acting on a bar magnet of pol...

The couple acting on a bar magnet of pole strength `2 Am` when kept in a magnetic field of intensity `10 A//m`, such that axis of the magnet makes an angle `30^(0)` with the direction of the field is `80xx10^(-7)Nm`. The distance between the poles of the magnet is

A

`2/pim`

B

`pi/2m`

C

63.36m

D

`1/(2pi)m`

Text Solution

Verified by Experts

The correct Answer is:
A

`C=MBsintheta`
Promotional Banner

Topper's Solved these Questions

  • MAGNETISM AND MATTER

    NARAYNA|Exercise EXERCISE - 2 (H.W)|24 Videos
  • MAGNETISM AND MATTER

    NARAYNA|Exercise EXERCISE - 3|20 Videos
  • MAGNETISM AND MATTER

    NARAYNA|Exercise EXERCISE - 1 (H.W)|30 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 bar magnet of pole strnegth 2A-m is kept in a magnetic field of induction 4xx10^(-5)wbm^(-2) such that the axis of the magnet makes an angle 30^(@) with the directon of the field. The couple acting on the magnet is found 80xx10^(-7)N-m . Then the distance between the poles of the magnet is

A magnet of length 10 cm and pole strength 4xx10^(-4)Am is placed in a manetic field of induction 2xx10^(-5)weber m^(-2) , such that the axis of the magnet makes an angel 30^(0) with the lines of induction. The moment of the couple acting on the magnet is

The couple acting on a magnet of length 10cm and pole strength 15A-m, kept in a field of B=2xx10^(-5) , at an anlge of 30^(@) is

The intensities of magnetic field at two points on the axis of a bar magnet at distances of 10 cm and 20 cm from the middle point are in the ratio 18:1. Find the distance between the poles of the magnet.

A long bar magnet has a pole strength of 10 Am . Find the magnetic field at a point on the axis of the magnet at a distance of 5cm from the north pole of the magnet.

The intensities of magnetic field at teo points on the axis of bar magnet at distance of 10 cm and 20 cm from the middle point in the ratio 18 : 1 . Find the distance between the pole of the magnets.

The intensities of a magnetic field at two points on the axis of a bar magnet at distance of 0.15m and 0.2m from its middle point are in the ratio 75 : 20 . Find the distance between the poles of the magnet.

The intensities of magnetic field at two points on the axis of a bar magnet at distances 0.1m and 0.2 m from its middle point are in the ratio 12.5:1. Calculate the distance between the poles of the magnet.

What is the geomwtric length of a bar magnet having pole strength 60 Am and magnetic moment 6 Am^(2) ?

NARAYNA-MAGNETISM AND MATTER-EXERCISE - 2 (C.W)
  1. Two magnets of magnetic moments M and sqrt3M are joined to form a cros...

    Text Solution

    |

  2. The rate of change of torque 'tau' with deflection theta is maximum fo...

    Text Solution

    |

  3. The couple acting on a bar magnet of pole strength 2 Am when kept in a...

    Text Solution

    |

  4. A bar magnet with poles 25cm apart and pole strength 14.4 Am rests wit...

    Text Solution

    |

  5. Two magnets of moments M(1) and M(2) are rigidly fixed togetherat thei...

    Text Solution

    |

  6. A short magnet placed with its axis making an angle with a uniform ext...

    Text Solution

    |

  7. Two short bar magnets of equal dipole moments 'M' each are fastened pe...

    Text Solution

    |

  8. The small magnets each of magnetic moment 10 A-m^(2) are placed end-on...

    Text Solution

    |

  9. The ratio of magnetic fields on the axial line of a long magnet at dis...

    Text Solution

    |

  10. Two short magnets AB and CD in the X-Y plane and are parallel to X-axi...

    Text Solution

    |

  11. Two identical short bar magnets, each having magnetic moment M, are pl...

    Text Solution

    |

  12. Magnetic inducton at a point on the axial line of a short bar magnet i...

    Text Solution

    |

  13. A magnetic dipole is under the inflluence of two magnetic fields havin...

    Text Solution

    |

  14. A short bar magnet is placed with its south pole facing geographic sou...

    Text Solution

    |

  15. A bar magnet is placed with its North pole pointing North. Neutral poi...

    Text Solution

    |

  16. A bar magnet is placed with its North pole pointing North. Neutral poi...

    Text Solution

    |

  17. The period of a thin magnet in a magnetic field is 2s. It is cut into ...

    Text Solution

    |

  18. A bar magnet suspended in magnetic meridian executes oscillations with...

    Text Solution

    |

  19. Two bar magnets are bound together side by side and suspended. They sw...

    Text Solution

    |

  20. A short bar magnet is oscillating in a magnetic field and its time per...

    Text Solution

    |