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Thread: what make the magnet to be magnet with magnetic field?

  1. #1 what make the magnet to be magnet with magnetic field? 
    Forum Bachelors Degree
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    Answer please. Thank you very much.


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  3. #2  
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    i don't know... huh... what makes a magnet a magnet in a magnetic field :-D just kidding.

    isnt it something to do with:

    1) get an iron bar
    2) Get a long length of wire
    3) wrap the wire around the iron bar.
    4) connect the two ends of the wire in a circuit.
    5) flip the switch (if you have one)... hey presto a regular magnet (the iron bar i mean).

    is it, if not then i dont know.


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  4. #3  
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    Magnetism ultimately is due to the motion of electric charge. For a macroscopic object, like a wire loop, an electric current flowing through it has a magnetic moment. Far from the loop there is a magnetic field proportional in strength to its magnetic moment.

    For a microscopic object, the physical picture is more complex. An electron within an atom can have orbital angular momentum and a magnetic moment proportional to that orbital angular momentum; the electron also has intrinsic angular momentum, or spin, and a magnetic moment proportional to that spin angular momentum. The orbital and spin angular momentum of an electron are comparable in magnitude, as are their magnetic moments. Far from the electron there is a magnetic field proportional in strength to its magnetic moment.
    http://en.wikipedia.org/wiki/Permanent_magnet
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