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Homework Help: Self inductance of a solenoid

  1. Oct 12, 2004 #1
    i was just confused here, which is the right formula for finding the self inductance of a solenoid, given the number of turns, the cross-sectional area, the length, and the current.

    is it L = Uo x Ur x N^2 x A / L
    (Uo = mu o, Ur = mu r)??

    pls if it is wrong, let me know the right formula.
    Last edited: Oct 12, 2004
  2. jcsd
  3. Oct 12, 2004 #2
    I think...it is [tex]L = \mu n^2 LA[/tex] where n = number of turns per unit length = N/L. Yours is correct.
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