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General Electrostats formulas

  1. Feb 23, 2012 #1
    1. The problem statement, all variables and given/known data

    http://u.spig.in/forum/105320795.jpg [Broken]

    2. Relevant equations

    general Electrostats formulas

    3. The attempt at a solution


    I tried to solve the problem using Energy conservation ie., Change in PE = Work done. But that seem to yield wrong answer (1) while the correct answer is 2.

    I had read a similar sum in Irodov's ' Basic Laws of Electromagnetism ' in which it was written that this method fails in above case. Please help me solving this.
     
    Last edited by a moderator: May 5, 2017
  2. jcsd
  3. Feb 23, 2012 #2
    Re: Eletrostatics

    did you make the final charge distribution in the system?
     
  4. Feb 24, 2012 #3
    Re: Eletrostatics

    What does that mean? Or How do I do it?
     
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