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Homework Help: Law of induction

  1. Apr 5, 2012 #1
    1. The problem statement, all variables and given/known data

    See attachment

    3. The attempt at a solution

    cos theta = 1 so we'll ignore that. I don't understand what's going on, it seems like the book has violated basic algebraic rules.

    The original equation, simplified somewhat is:

    ε = (BA)/t

    In order to get B by itself, you multiply both sides by t

    εt = BA

    Then divide both sides by A

    (εt)/A = B

    The book has it differently

    Attached Files:

  2. jcsd
  3. Apr 5, 2012 #2


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    Homework Helper

    Right. the book has B = E/(A/t) = Et/A which is what you have.
  4. Apr 5, 2012 #3
    Ok, I didn't see that little slash between A and t
  5. Apr 5, 2012 #4


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    Homework Helper

    It is a bit hard to see with the modulus sign.
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