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Homework Help: Polarity of induced voltage

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

    This is seriously going to drive me insane. I know that a time changing B field produces a curling E field. For case #1, I have an open circuited loop with a B field increasing out of the page. This should create a polarity indicated in my picture.

    I hook up a load to it. I have an electric field curling in the clockwise direction, E is proportional to current density, and so the polarity across the terminals should be reversed.

    And yet my prof/all other people keep telling me that the polarity stays the same. So by connect a load, we actually reverse the direction of the electric field?

    2. Relevant equations

    Curl E = -dB/dt;

    3. The attempt at a solution

    see above

  2. jcsd
  3. Feb 25, 2012 #2
    'Picture' ? You missed it.
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