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Homework Help: Is this magnetic field equation correct in material as well?

  1. Nov 30, 2015 #1
    1. The problem statement, all variables and given/known data
    Or is it only valid in vacuum condition? Segment of straight wire carrying current I
    (at distance r)
    dB = u.Idl x r / 4pi . r^2

    (I've came across it on a book about Maxwell's Equations.)

    2. Relevant equations

    3. The attempt at a solution
    Does correction have to be made for polarization or magnetization of the material medium? If so, how?
  2. jcsd
  3. Dec 1, 2015 #2


    User Avatar
    Science Advisor

    In a medium, I would expect it to hold with dH instead of dB.
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