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Electromagnetic induction graph of E versus I

  1. Apr 28, 2014 #1
    1. The problem statement, all variables and given/known data

    for this question, i only know that E=-L dI/dt... the ans is C , can anyone explain how to get C?
    2. Relevant equations



    3. The attempt at a solution
     

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  2. jcsd
  3. Apr 28, 2014 #2

    BvU

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    Your "I only know" expression does not apply. I is in the big coil, not in the little rectangular one.

    "Carrying a variable I" here means they are able to set the current to a number of values. (*) You may assume dI/dt = 0.

    (*) So what do they vary in this way ? Aha!
     
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