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What Changes If i Place two magnets together?

  1. May 10, 2013 #1
    What Changes If i Place two magnets together??

    Hello everybody,

    i wanted to ask what changes when i unite two magnets ??

    except from the dimensions does magnetic moment, Br change?

    Thanx in advance!
  2. jcsd
  3. May 10, 2013 #2

    Simon Bridge

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    You mean when you sit a N-pole of one magnet on a S-pole of another?
    You've just made a new magnet with poles farther apart haven't you?
    You should be able to work out the consequences from you existing knowledge of how magnets work.

    Similarly - what happens when you saw a magnet in half and separate the halves?
  4. May 13, 2013 #3
    xmmm ok thanx!it is just that i read somewhere that magnetic moment goes to zero if i unite 2 magnets in their different poles and that confused me a bit!
  5. May 13, 2013 #4

    Simon Bridge

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    Magnetism is very complicated so it is common to get confused.
    The moment between the poles gets very small as they approach each other - yes - and may go to zero if the model puts the pole "charge" on the surface of the physical magnets. However each magnet has another pole.

    In a simple before and after picture using poles:
    - before you had two separate short magnets each with two poles for a total of four;
    - after you have one long magnet with two poles.
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