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Application of gauss law

  1. Aug 5, 2010 #1
    1. The problem statement, all variables and given/known data
    A circular ring of radius a carries a uniform charge q C/m and is placed on x-y plane with axis same as z axis. To determine E at P(0,0,h). My ques is can't we apply gauss theorem? if yes then what will be the gaussian surface? if no then why not?


    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Aug 5, 2010 #2

    Doc Al

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    Staff: Mentor

    Gauss's law won't help you because there isn't enough symmetry. Gauss's law helps when you can claim that the field is uniform over a surface--that's not the case here.

    You'll have to use brute force and integrate.
     
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