Home
Class 12
PHYSICS
A bar magnet of length 10 cm experiences...

A bar magnet of length `10 cm` experiences a torque of `0.141 N-m` in a uniform magnetic field of induction `0.4 wb//m^(2)`, when it is suspended making an angle `45^(@)`with the field, the pole strength of the magnet is

A

`5A-m`

B

`2.5A-m`

C

`10 A-m`

D

`15 Am`

Text Solution

Verified by Experts

The correct Answer is:
A
`tau=MB sin theta`
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 bar magnet of length 0.2 m and pole strength 5 Am is kept in a uniform magnetic induction field of strength 15 wb//m^(-2) making an angle of 30^(@) with the field. Find the couple acting on it.

A bar magnet of length 10cm and pole strength 2 Am makes an angle 60^(0) with a uniform magnetic field of induction 50T . The couple acting on it is

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

The length of a bar magnet is 10 cm and its pole strength is 10^(-3) Weber. It is placed in a magnetic field of induction 4 pi × 10^(-3) Tesla in a direction making an angle 30^(@) with the field direction. The value of torque acting on the magnet will be –

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

.A magnet of magnetic moment 4.0"A-m^(2) is held in a uniform magnetic field of induction 5.0times10^(-4)T with the magnetic moment vector making an angle 30∘ with the field.The work done in increasing the angle from "30∘ to "45∘ is about

Can a magnetic dipole experience a torque or net force in (i) a uniform magnetic field and (ii) a non-uniform magnetic field?

A bar magnet of magnetic moment M is divided into 'n' equal parts cutting parallel to length. Then one part is suspended in a uniform magnetic field of strength 2T and held making an angle 60^(@) with the direction of the field. When the magnet is released the K.E of the magnet in the equilibrium position is

NARAYNA-MAGNETISM-LEVEL-II (H.W)
  1. A bar magnet is suspended in a uniform magnetic field in a position su...

    Text Solution

    |

  2. If the maximum couple acting on a magnet in a field of induction 0.2 t...

    Text Solution

    |

  3. A bar magnet of length 10 cm experiences a torque of 0.141 N-m in a un...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |