Home
Class 12
PHYSICS
Find the amount of current required to d...

Find the amount of current required to demagnetise a permanent magnet of coercivity `3 xx 10^4 Am^(-1)` kept inside a 0.2 m long solenoid of 500 turns.

Text Solution

Verified by Experts

12A
Promotional Banner

Topper's Solved these Questions

  • MAGNETISM AND MATTER

    MODERN PUBLICATION|Exercise CONCEPTUAL QUESTIONS|30 Videos

  • MAGNETISM AND MATTER

    MODERN PUBLICATION|Exercise TOUGH AND TRICKY PROBLEM|5 Videos

  • MAGNETISM AND MATTER

    MODERN PUBLICATION|Exercise CHAPTER PRACTICE TEST FOR BOARD EXAMINATION|16 Videos

  • ELECTROSTATIC POTENTIAL AND CAPACITANCE

    MODERN PUBLICATION|Exercise Chapter Practice Test|9 Videos

  • MOVING CHARGES AND MAGNETISM

    MODERN PUBLICATION|Exercise CHAPTER PRACTICE TEST|13 Videos

Similar Questions

Explore conceptually related problems

The coercive force for a certain prmanent magnet is 4.0 xx 10^4 A m^(-1) . This magnet is placed inside a long solenoid of 40 turns/cm and a current is passed in the solenoid to demagnetize it completely. Find the current.

The coercivity of a certain permanent magnet is 4.0xx10^(4)Am^(-1) . The magnet is placed insider a solenoid 20cm long having 700 turns and a current is passed in the solenoid to demagnetise it completely. Find the current

The coercivity of a certain permanent magnet is 4*0xx10^4Am^-1 . This magnet is placed inside a solenoid 15cm long and having 600turns . Calculate the current required to demagnetise the magnet completely.

The coercive force for certain permanent magnet is 2times10^(4)A/m .This magnet is placed inside a long solenoid of 40 turns/cm and a current is passed in the solenoid to demagnetize the magnet.The value of current (in A) is

A bar magnet having coercivity 4 xx 10^(3) Am^(-1) is demagnetised by inserting it inside a solenoid 10 cm long and having 50 turns. The current that should be sent through the solenoid is

The coercitivity of a small magnet where the ferromagnet gets demagnetized is 3 xx 10^(3) Am^(-1) . The current required to be passed in a solenoid of length 10 cm and number of turns 100 , so that the magnet gets demagnetized when inside the solenoid , is :

A long solenoid has 20 turns per cm and carries a current i. the magnetic field at its centre is 6.28xx10^(-2)Wb//m^(2) . Another long solenoid has 100 turns per cm and it carries a current i//3 . The value of the magnetic field at its centre is

A solenoid of radius 4 cm and 1000 turns , carries a current of 8 A. If it is equivalent to a magnet of same size and magnetisation vec(M) (Magnetic moment / Volume) of 20000 Am^(-1) , then the length of the solenoid is

MODERN PUBLICATION-MAGNETISM AND MATTER-PRACTICE PROBLEM
  1. A bar magnet of length 10cm is placed in the magnetic meridian with it...

    Text Solution

    |

  2. A short bar magnet of magnetic moment 0*9JT^-1 is placed with its axis...

    Text Solution

    |

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

    Text Solution

    |

  4. A magnetic needle has magnetic moment of 6*7xx10^-2Am^2 and moment of ...

    Text Solution

    |

  5. Two magnets of magnetic moments M and sqrt3M are joined to form a cros...

    Text Solution

    |

  6. The earth's magnetic field at the equator is approximately 0*4G, Estim...

    Text Solution

    |

  7. A bar magnet is suspended in a region of earth's magnetic field such t...

    Text Solution

    |

  8. Two bar magnets of magnetic moment M and (3M)/(5) are kept in a regi...

    Text Solution

    |

  9. For a place, the true value of angle of dip is 30^@ . Find the appare...

    Text Solution

    |

  10. A freely suspended bar magnet makes an angle of 60^@ with the horizon...

    Text Solution

    |

  11. In the magnetic meridian of a certain place, the horizontal component ...

    Text Solution

    |

  12. For a place, horizontal component of the earth's magnetic magnetic fie...

    Text Solution

    |

  13. A compass needle whose magnetic moment is 60Am^2 points geographic nor...

    Text Solution

    |

  14. A short bar magnet is placed with its north pole pointing north. The n...

    Text Solution

    |

  15. A 10 cm long bar magnet of magnetic moment 1.34 Am2 is placed in the m...

    Text Solution

    |

  16. A short bar magnet is placed with its north pole pointing north. The n...

    Text Solution

    |

  17. The magnetic moment of an electron of charge e moving in a circular ...

    Text Solution

    |

  18. A magnetic field of 1600Am^-1 produces a magnetic flux of 2*4xx10^-5 w...

    Text Solution

    |

  19. Find the amount of current required to demagnetise a permanent magnet ...

    Text Solution

    |

  20. A domain in ferromagnetic iron is in the form of a cube of side length...

    Text Solution

    |