Home
Class 12
PHYSICS
What happens if an iron bar magnet is me...

What happens if an iron bar magnet is melted ? Does it retain its magnetism?

Text Solution

Verified by Experts

Molten iron does not retain its magnetism because in the process it is heated up even beyond the Curie temperature and loses its ferromagnetic character.
Promotional Banner

Topper's Solved these Questions

  • MAGNETISM AND MATTER

    U-LIKE SERIES|Exercise LONG ANSWER QUESTIONS-II|2 Videos

  • MAGNETISM AND MATTER

    U-LIKE SERIES|Exercise SELF ASSESSMENT TEST (Section A) (Multiple choice Questions)|5 Videos

  • MAGNETISM AND MATTER

    U-LIKE SERIES|Exercise SHORT ANSWER QUESTIONS|22 Videos

  • EXAMINATION PAPER 2020 (SOLVED)

    U-LIKE SERIES|Exercise SECTION D|6 Videos

  • MODEL TEST PAPER 1 (UNSOLVED)

    U-LIKE SERIES|Exercise SECTION B|1 Videos
U-LIKE SERIES-MAGNETISM AND MATTER-LONG ANSWER QUESTIONS-I
  1. A small compass needle of magnetic moment 'm' and moment of inertia 'l...

    Text Solution

    |

  2. Show that the time period (T) of oscillations of a freely suspended ma...

    Text Solution

    |

  3. What happens if a bar magnet is cut into two pieces: (i) transverse to...

    Text Solution

    |

  4. What happens if an iron bar magnet is melted ? Does it retain its magn...

    Text Solution

    |

  5. A magnetised needle in a uniform magnetic field experiences a torque b...

    Text Solution

    |

  6. Must every magnetic field configuration have a north pole and a south ...

    Text Solution

    |

  7. Can you think of a magnetic field configuration with three poles ?

    Text Solution

    |

  8. Two identical looking iron bars A and B are given, one of which is def...

    Text Solution

    |

  9. Name three elements required to specify the earth's magnetic field at ...

    Text Solution

    |

  10. Define the following using suitable diagrams : (i) Magnetic declinat...

    Text Solution

    |

  11. (a) State Gauss's law for magnetism. Explain its significance. (b) W...

    Text Solution

    |

  12. A short bar magnet placed with its axis inclined at 30^@ to the exter...

    Text Solution

    |

  13. A bar magnet of magnetic moment 6 J/T is aligned at 60^@ with a unifor...

    Text Solution

    |

  14. A uniform magnetic field gets modified as shown in Fig. when two spec...

    Text Solution

    |

  15. Name the three types of magnetic materials which behave differently wh...

    Text Solution

    |

  16. If X stands for the magnetic susceptibility of a given material, ident...

    Text Solution

    |

  17. Three identical specimens of magnetic maerials , uniform magnetic fiel...

    Text Solution

    |

  18. Explain the phenomenon of hysteresis in magnetic materials.

    Text Solution

    |

  19. What are permanent magnets ? What is an efficient way of preparing a p...

    Text Solution

    |

  20. What is the difference between an electromagnet and a permanent magnet...

    Text Solution

    |