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Conducting Spheres in Electrostatic Equilibrium

  1. Mar 4, 2010 #1
    1. The problem statement, all variables and given/known data

    3MafV.png

    2. Relevant equations

    potential, V = kq/r where k is 1/4 pi epsilon

    conservation of charge, sum of q = Q

    3. The attempt at a solution

    what i did is let q1 + q2 + q3 = 4*10^-4

    then let V1 = V2 = V3 and solve for q3

    but i end up getting q3 = 0.0002 which is not the correct ans, which is c, 2.06*10^-4
     
  2. jcsd
  3. Mar 4, 2010 #2
    any help? much appreciated!
     
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