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Induced current

  1. Nov 12, 2006 #1
    Hello All,

    I have a question regarding induced EMF in a wire via a magnetic field. Check out the attached drawing to see my specific situation. If I have a piece of wire with length L and a magnetic field (from, say, a permanent magnet), moving along the length of wire with velocity V, how do I calculate the amount of emf produced in the wire? I'm trying to come up with a formula to calculate the emf if I know the length of the wire segment, the strength of the B field, and the speed at which it is moving along the wire. To give the field itself some dimension, I suppose I could denote the width of the field exposed to the wire as W.

    Jason O

    Attached Files:

  2. jcsd
  3. Nov 13, 2006 #2


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    Staff: Mentor

    The figure isn't making sense to me yet. The wire and the B field are parallel? I don't think you'll induce any EMF in that geometry. The electrons in the wire need to move perpendicular to the B field in order for EMF to be generated. F = qv x B
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