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Force on a Magnet Moving through a Wire Loop

  1. Mar 25, 2012 #1
    1. The problem statement, all variables and given/known data

    What is the force acting on a magnetic dipole that falls through a loop of wire?

    Any sort of answer, exact, approximate or a reference to a source that covers this would be excellent. I haven't been able to find much of anything on this problem.

    2. Relevant equations
    3. The attempt at a solution

    Start with:
    V=-d(BA)/dt
    V=I*R_circuit + L*dI/dt
    B-field of a loop of wire
    U=-m*B
    F=-dU/dx (and this is hugely messy and nonlinear)
     
  2. jcsd
  3. Mar 25, 2012 #2

    rude man

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    Homework Helper
    Gold Member

    For openers, I believe it depends on the resistance of the wire loop.
     
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