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Time Dependant Magnetic Field

  1. Mar 23, 2016 #1
    1. The problem statement, all variables and given/known data
    See attached photo. It has question and answers.

    2. Relevant equations
    Maybe integral of B.dL=Mo i ? I'm not sure

    3. The attempt at a solution
    I tried using the above equation and solved for i but it gives i with respect to time and the answer is 10A. I'm not sure how to get an answer without t.
     
  2. jcsd
  3. Mar 23, 2016 #2
    Sorry I forgot the picture
     

    Attached Files:

  4. Mar 23, 2016 #3

    rude man

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    Homework Helper
    Gold Member

    Y ou're not thinking of the right law.
    Think Maxwell, specifically ∇ x E = -∂B/∂t. Then go to Stokes.

    EDIT: Or Faraday: compute the whole dΦ/dt for your area. I guess that is more straight-forward.
    (You can do this in your head!)
     
    Last edited: Mar 24, 2016
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