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Homework Help: Force between parallel plates in a capacitor

  1. Feb 13, 2009 #1
    1. The problem statement, all variables and given/known data

    Hey guys.
    So, I got this problem.
    According to their hint I'm suppose to calculate the work of moving one of the plates and from their, get to the force.
    I don't have a clue how to do that. I can't find a single formula that can help with that.
    Can I please have some help...?:smile:

    Thanks.


    2. Relevant equations



    3. The attempt at a solution
     

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  3. Feb 13, 2009 #2

    LowlyPion

    User Avatar
    Homework Helper

    Here. You can watch the first part of this lecture:

    https://www.youtube.com/watch?v=7NUbsQt-G9U
     
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