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How the reluctance in a magnetic circuit depends on flux?

  1. Oct 1, 2016 #1
    Since reluctance is equal to length decided by product of permeability and area of cross section,how does reluctance change with flux?
     

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  3. Oct 1, 2016 #2
    Length divided by product of permeability and area of cross section
     
  4. Oct 3, 2016 #3

    jim hardy

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    That's a property of whatever is the medium through which you are pushing the flux.


    Try starting here

    https://en.wikipedia.org/wiki/Permeability_(electromagnetism)

    and would you be polite enough to rotate your image 90 degrees ccw?
     
  5. Oct 3, 2016 #4
  6. Oct 3, 2016 #5

    jim hardy

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    It's okay, you're pretty new here.

    You already know the answer.
    Length and cross section are not dependent on flux (excepting maybe magnetorestriction in iron)

    that leaves permeability
    which for free space is a constant
    and
    as that Wiki article explains for most other materials is very near the same constant
    the big exception being ferromagnetic materials
    which have the classic BH saturation curve.
     
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