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Solenoid with a magnetic core

  1. Nov 9, 2008 #1
    1. The problem statement, all variables and given/known data

    A long solenoid with 70.0 turns of wire per centimeter carries a current of 0.100 A. The wire that makes up the solenoid is wrapped around a solid core of silicon steel (Km=5200). (The wire of the solenoid is jacketed with an insulator so that none of the current flows into the core.)

    For a point inside the core, find the magnitude of the magnetic field B due to the solenoid current.
    2. Relevant equations

    3. The attempt at a solution

    I used the regular solenoid equation B = munaught(n)I but i replaced munaught with munaught*5200 this gave me 4.55 but that isn't the right answer?
  2. jcsd
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