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Homework Help: Electric potential 2

  1. Dec 26, 2008 #1
    1. The problem statement, all variables and given/known data

    Hey guys.
    Look at this question, I already did the first part.
    I have no idea how to do the second one, even with the clue...

    Can Someone please help me with that?

    2. Relevant equations

    3. The attempt at a solution

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  3. Dec 27, 2008 #2


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    Staff Emeritus
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    Gold Member

    Well, the HINT suggests using integration by parts, have you tried that?

    You should note that integration by parts for vector equations is not the same as for scalar equations. If you're not familiar with using integration by parts on vector equations, it is also possible to use Green's formula.
    Last edited: Dec 27, 2008
  4. Dec 27, 2008 #3


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    Homework Helper

    Also, you will probably find one of Maxwell's equations fairly useful... The one that relates charge density to electric field.
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