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Rectangular loop near wire emf

  1. May 6, 2014 #1
    1. The problem statement, all variables and given/known data


    pg: 10-17

    2. Relevant equations

    3. The attempt at a solution

    I do not understand conceptually, why we chose the rectangular surface to take the flux over. Can anyone explain this please? i am having great trouble with it.

    thank you.
  2. jcsd
  3. May 6, 2014 #2
    It just makes it easy mathematically to demonstrate the calculation. Any other weird shape will need numerical techniques to do the integral.
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