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Find expression for electric field given B(t)

  1. Nov 25, 2016 #1
    Capture.JPG 1. The problem statement, all variables and given/known data
    See picture above

    2. Relevant equations
    Int (E dot dl) = Int (B dot dA)

    3. The attempt at a solution

    Where did I go wrong? Is there a sign error possibly or am I off conceptually?

  2. jcsd
  3. Nov 25, 2016 #2

    Charles Link

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    The only thing I see that is incorrect is in your relevant equations (2), it should say ## -dB/dt ## instead of ## B ##. Their ## dl ## in the figure is in the opposite direction of what it should be, but I don't think that is your mistake. The line integrals in these Stoke's formulas always go counterclockwise with +z out of the paper. Perhaps the instructor wanted you to spot that anomaly, etc....
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