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Homework Help: E-field of a molecule on a point

  1. Nov 10, 2011 #1
    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
  2. jcsd
  3. Nov 11, 2011 #2

    ehild

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    Homework Helper

    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
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