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Homework Help: Lenz's law - need clarification

  1. Nov 1, 2006 #1
    I only understand Len'z law for a current induced in a single loop... however I don't for in a coil... What does the relative poisition of the manetic poles of the magnet and the coil respectively has to do with the direction of the current?
     
  2. jcsd
  3. Nov 1, 2006 #2

    OlderDan

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    A coil is just multipe loops. If you understand what happens for a single loop, it happens N times as much for a coil of N turns. The direction of the current in each loop of the coil is the same as for a single loop. The induced emf is additive, so the total voltage is N times the voltage of a single loop. If the only resistance is external to the wire, the current will also be N times the current for a single loop.
     
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