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Why does not dipole moment depend on coordinates system?

  1. Oct 17, 2015 #1
    1. The problem statement, all variables and given/known data
    123123.PNG

    This is problem 6.5 in Griffiths EM.
    I can't understand why dipole moment does not depend on coordinate systems.
    2. Relevant equations


    3. The attempt at a solution
     
  2. jcsd
  3. Oct 17, 2015 #2

    pasmith

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    Homework Helper

    He's saying that [itex]\mathbf{p}[/itex] is constant in space, so its spatial derivatives vanish. Presumably this was stated in the problem statement.
     
  4. Oct 17, 2015 #3

    There is not such presumption stated in problem .
    The solution is saying that " Dipole moment P doesn't depend on coordinates system" is a generalized and obvious idea
     
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