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Electromagnetic induction

  1. Oct 19, 2011 #1
    1. The problem statement, all variables and given/known data
    When we place a magnet in a long coil of wire the emf will be maximum when the magnet is at either end. What would happen when the magnet lies in the middle of the coil (i.e: the same amount of flux is interacting with the coil at all times). Would we have an induced EMF because each coil (in the long coil of wire) has an EMF induced in it, surely, because it is interacting with a coil and its interaction is changing

    2. Relevant equations
    NONE


    3. The attempt at a solution
    see above
     
  2. jcsd
  3. Oct 19, 2011 #2
    Imagine that this is one very very long magnet. Then the magnetic field is roughly constant through the coil even if the magnet is moving (no where near its two ends). No change in magnetic field means no induced electric field.
     
  4. Oct 19, 2011 #3
    so induced EMF is only associated with the coil's ends. is this right?
     
    Last edited: Oct 19, 2011
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