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Homework Help: Magnetic Field Strength Needed

  1. May 12, 2010 #1
    1. The problem statement, all variables and given/known data
    Hi, I am trying to calculate the current and magnetic field strength needed to pick up a 0.3125 lb. piece of a channel lock plier made of ferritic stainless steel (they have a soft magnetic component) on its y axis (on the lighter part of the piece) at an 80 degree angle. The magnet would be located 9.36 in. above the piece of steel.

    2. Relevant equations
    Fb = ILB
    Fb = qvB
    B = ([tex]\mu[/tex]0I)/[4pi(y)]

    3. The attempt at a solution
    I drew a freebody diagram and found that the magnetic force needed to pick up the piece of channel lock plier would be 12.3N. I did more research and found that a magnetic field force would only be exerted on moving charge particles.

    Now I am stumped on how to find the current and magnetic field strength without knowing the other.
  2. jcsd
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