Home
Class 11
PHYSICS
If a magnet of length 10cm and pole stre...

If a magnet of length `10cm` and pole strength `40 A-m` is placed at an angle of `45^(@)` in an uniform induction field of intensity `2xx10^(-4)T`, the couple acting on it is

A

`0.5656 xx 10^(4) N-m`

B

`0.5656 xx 10^(-3) N-m`

C

`0.656 xx 10^(-4) N-m`

D

`0.656 xx 10^(-5) N-m`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • MAGNETIC EFFECT OF ELECTRIC CURRENT

    TARGET PUBLICATION|Exercise Evaluation Test|12 Videos

  • MEASUREMENTS

    TARGET PUBLICATION|Exercise EVALUATION TEST|17 Videos

Similar Questions

Explore conceptually related problems

The magnetic moment of a length 10 cm and pole strength 4.0 Am will be

A magnet of length 0.1 m and pole strength 0.1 Am is freely suspended in a horizontal uniform magnetic field of intensity 0.18 xx 10^(-4)T . Find the torque tending to restore the magnet to its original position of rest when it is deflected by 30^(@) from that position.

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 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.

Calculate the torque acting on a magnet of length 20 cm and of pole strength 2 xx 10^(-5) Am , placed in earth's magnetic field of flux density 2 xx 10^(-5) T , when (i) magnet is parallel to the field (ii) magnet is perpendicular to the field .

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 length 0.1 m and pole strength 10^(-4) A.m. is kept in a magnetic field of 30 Wb//m^(2) at an angle 30^(@) . The couple acting on it is …xx10^(-4)Nm .

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

Calculate torque acting on a bar magnet of length 20 cm magnetic dipole moment 4 xx 10^(-6) Am^(2) , which is placed in earth's magnetic field of flux density 2 xx 10^(-5) T , perpendicular to the field .

TARGET PUBLICATION-MAGNETISM-MCQs
  1. A bar magnet of magnetic moment 200 A-m^(2) is suspended in a magnetic...

    Text Solution

    |

  2. A magnet of length 0.1 m and pole strength 10^(-4) A.m. is kept in a m...

    Text Solution

    |

  3. If a magnet of length 10cm and pole strength 40 A-m is placed at an an...

    Text Solution

    |

  4. A closely wound solenoid of 2000 turns and area of cross-section 1.5 x...

    Text Solution

    |

  5. Magentic meridian is a

    Text Solution

    |

  6. The relation between BH, Bv, and B is

    Text Solution

    |

  7. Direction of magnetic field at equatorial point

    Text Solution

    |

  8. At magnetic poles of earth, angle of dip is

    Text Solution

    |

  9. Angle of dip is zero at

    Text Solution

    |

  10. At a certain place the horizontal component of the earth's magnetic fi...

    Text Solution

    |

  11. At certain place, the horizontal component of earth's magnetic field i...

    Text Solution

    |

  12. The horizontal component of the earth's magnetic field is 0.22 Gauss a...

    Text Solution

    |

  13. At a certain place, the horizontal component of earth's magnetic field...

    Text Solution

    |

  14. The vertical component of earth's magnetic field at a place is sqrt3 ...

    Text Solution

    |

  15. The angle of dip at a place is 37^(@) and the vertical component of th...

    Text Solution

    |

  16. The Earth's magnetic field at some place on magnetic equator of Earth ...

    Text Solution

    |

  17. If theta1 and theta2 be the apparent angles of dip observed in two ver...

    Text Solution

    |

  18. The material suitable for making electromagnets should have

    Text Solution

    |

  19. Electromagnets are made of soft iron because soft iron has

    Text Solution

    |

  20. Consider a point on an equatorial axis of a short bar magnet. The dire...

    Text Solution

    |