1. Nov 10, 2011 #1

   acedeno

   

   1. The problem statement, all variables and given/known data
   
   http://postimage.org/image/cky823nof/ [Broken]
   
   2. Relevant equations
   
   
   E=kq/r^2
   
   3. The attempt at a solution
   
   I figured I would just find the electric field produced at point * by each individual charge and then add them. For example if I were to set E1 to be the top molecule the field produced by 2e would be
   
   E1=k2e/(R^2+0.25) where r = √(R^2 + 0.5^2)
   
   so E=k[(q1/r1^2)+(q2/r2^2)+(q3/r3^2)+(q4/r4^2)]

    

   Last edited by a moderator: May 5, 2017

   acedeno, Nov 10, 2011
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3. Nov 11, 2011 #2

   ehild

   

   Homework Helper

   Gold Member

   The electric field is vector quantity. The contributions of the different point charges have different directions. Take it into account.
   
   
   ehild

    

   Last edited: Nov 11, 2011

   ehild, Nov 11, 2011

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