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Hysteresis loop

  1. Mar 25, 2012 #1
    1. The problem statement, all variables and given/known data
    What hysteresis loop shape would you require for a magnetic material to be used in

    A) a permanent magnet
    B) transformer core

    3. The attempt at a solution

    No idea what this means...but it is for my lab tomorrow so I probably should.

    Any help would be greatly appreciated,
     
  2. jcsd
  3. Mar 25, 2012 #2

    rude man

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    Gold Member

    Think of a B-H hysteresis loop and how B does not return to zero when H does (remebering that H is prportional to applied current). Would that work to make a permanent magnet?

    Then recall that the area under the B-H curve represents energy lost. Would that be a good material for a transformer core?

    cf. wikipedia/wiki/magnetic_core.com
     
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