Home
Class 12
PHYSICS
A short bar magnet of magnetic moment 12...

A short bar magnet of magnetic moment `12.8xx10^(-3)Am^(2)` is arranged in the magnetic meridian with its south pole pointing geographic north. If `B_(H)=0.4` gauss, the distance between the null points is

A

`4cm`

B

`8cm`

C

`12cm`

D

`16cm`

Text Solution

Verified by Experts

The correct Answer is:
B
`B_(H)=(mu_(0))/(4pi)(2M)/(d^(3))`
Promotional Banner

Topper's Solved these Questions

  • MAGNETISM

    NARAYNA|Exercise LEVEL-I (H.W)|30 Videos

  • EXPERIMENTAL PHYSICS

    NARAYNA|Exercise Comprehension type|6 Videos

  • MAGNETISM AND MATTER

    NARAYNA|Exercise EXERCISE - 4 (SINGLE ANSWER TYPE QUESTION)|17 Videos

Similar Questions

Explore conceptually related problems

A short bar magnet of magnetic moment 1.2Am^(2) is placed in the magnetic meridian with its south pole pointing the north. If a neutral point is found at a distance of 20cm from the centre of the magnet, the value of the horizontal component of the earth's magnetic field is

A 10 cm long bar magnet of magnetic moment 1.34 Am2 is placed in the magnetic meridian with its south pole pointing geographical south. The neutral point is obtained at a distance of 15 cm from the centre of the magnet. Calculate the horizontal component of earth’s magnetic field.

A short bar magnet of magnetic moment 0*5JT^-1 is placed with its magnetic axis in the magnetic meridian, with its north pole pointing geographic north. A neutral point is obtained at a distance of 0*1m from the centre of the magnet. Find the horizontal component of earth's magnetic field.

A short bar magnet of magnetic moment 0*5JT^-1 is placed with its magnetic axis in magnetic meridian, with its north pole pointing geographic north. A neutral point is obtained at a distance of 0*1m from the centre of the magnet. Find the horizontal component of earth's magnetic field.

A magnetic of magnetic moment 215 Am^(2) placed on the magnetic meridian with its N-pole towards grographic north.The distance between the two neutral points is 12 cm.The horizontal component of earth's field at that place is

A bar magnet of length 10cm is placed in the magnetic meridian with its north pole pointing towards the geographical north. A neutral point is obtained at a distance of 12cm from the centre of the magnet. Find the magnetic moment of the magnet, when H=0*34 gauss .

A short bar magnet has a magnetic moment of 10 Am^(2) .If its length is 10 cm,then the pole strength of the dipole is

What is the number netural points for a bar magnet with its north pole pointing geographical north ?

A bar magnet is placed with its north pole towards geographic north. The neutral point

A bar magnet of length 14 cm is placed in the magnetic meridian with its north pole pointing towards the geographic north pole. A neutral point is obtained at a distance of 18 cm from the center of the magnet. If B_(H)=0.4 G, the magnetic moment of the magnet is (1G = 10 ^(-4) T)

NARAYNA-MAGNETISM-LEVEL-II (H.W)
  1. A bar magnet of length 10 cm experiences a torque of 0.141 N-m in a un...

    Text Solution

    |

  2. A bar magnet of pole strnegth 2A-m is kept in a magnetic field of indu...

    Text Solution

    |

  3. A magnet of magnetic moment 20(hatk) Am^(2) is placed along the z-axis...

    Text Solution

    |

  4. The torque required to keep a magnet of length 10cm at 45^(@) to a uni...

    Text Solution

    |

  5. A bar magnet of moment 40 A-m^(2) is free to rotate about a vetical ax...

    Text Solution

    |

  6. A bar magnet of magnetic moment M is divided into 'n' equal parts cutt...

    Text Solution

    |

  7. A short bar magnet of magnetic moment 12.8xx10^(-3)Am^(2) is arranged ...

    Text Solution

    |

  8. The magnetic field strength at a point a distance 'd' form the centre ...

    Text Solution

    |

  9. Two north poles each of pole strength 8Am are placed at corners A and ...

    Text Solution

    |

  10. Two short bar magnets of magnetic moments 0.1245 Am^(2) and 0.512 Am^(...

    Text Solution

    |

  11. A bar magnet of moment of inertia I is vibrated in a magnetic field of...

    Text Solution

    |

  12. A bar magnet has moment of inertia 49x10^(2)kgm^(2) vibrates in a magn...

    Text Solution

    |

  13. A thin rod 30 cm long is uniformly magnetised and its period of oscill...

    Text Solution

    |

  14. A magnet freely suspended in a vibration magnetometer makes 40 oscilla...

    Text Solution

    |

  15. A magnetic needle pivoted through its centre of mass and is free to ro...

    Text Solution

    |

  16. The magnetic susceptinility of a medium is 0.825. Its relative permeab...

    Text Solution

    |

  17. A magnetic field strength (H) 3xx10^(3) Am^(-1) produces a magnetic fi...

    Text Solution

    |

  18. The magnetic moment of a magnet of mass 75 gm is 9xx10^(-7) A-m^(2). I...

    Text Solution

    |

  19. A magnetising field of 5000 A//m produces a magnetic flux of 5xx10^(-5...

    Text Solution

    |

  20. A short bar magnet of magnetic moment 20Am^(2) has a cross sectional a...

    Text Solution

    |