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Electrostatic Equilibrium Problem

  1. Sep 4, 2014 #1
    Electrostatics Equilibrium Problem-It is required to hold four equal point charges +q each in equilibrium at the corners of a square. Find the point charge that will do this if kept at the center of the square?
    I am doing the basics of coulomb's law,can anyone explain this to me?
    I cannot do this problem,the problem seems to be complex to me?
     
  2. jcsd
  3. Sep 4, 2014 #2

    Doc Al

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    Staff: Mentor

    Start by drawing a diagram. Pick one of the charges. Figure out what force the other three charges exert on it. (The forces are vectors, so be careful.)

    Once you do that you'll be in a better place to figure out what that central charge must be.
     
  4. Sep 4, 2014 #3
    Sir,what to do about the direction of the vector?
     
  5. Sep 4, 2014 #4

    Doc Al

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    Staff: Mentor

    Start by drawing that diagram.
     
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