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Explain, briefly, what a hysteresis cycle is

  1. Jul 11, 2011 #1
    1. The problem statement, all variables and given/known data

    explain, briefly, what a hysteresis cycle is [2 marks]

    3. The attempt at a solution

    I don't think the answer is to draw a graph because that is the next question. The subject is electricity and magnetism but the above question does not refer specifically to electricity and magnetism. I have looked things up in books and the internet, but none of them will define the hysteresis cycle briefly, they all write paragraphs
     
  2. jcsd
  3. Jul 11, 2011 #2

    rl.bhat

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    When a ferromagnetic material is magnetized in one direction, it will not relax back to zero magnetization when the imposed magnetizing field is removed. It must be driven back to zero by a field in the opposite direction. If an alternating magnetic field is applied to the material, its magnetization will trace out a loop called a hysteresis loop. The lack of re-traceability of the magnetization curve is the property called hysteresis and it is related to the existence of magnetic domains in the material.
     
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