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Homework Help: Finding the net electric field

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

    Find the electric field at the center of a square having side = 1m and having the following charges at each corner:

    Q1:-1 x 10^-6
    Q3: -2 x 10^-6
    Q2: 2 x 10^-6
    Q4: -1 x 10^-6

    (Q1 is upper left corner, Q2 is upper right, q3 is lower left and Q4 is lower right)

    2. Relevant equations

    E= k*q/r2

    3. The attempt at a solution

    I used the equation to found the electric field for each of the charges (Q1: -18000, Q2: 36000, Q3: 36000, Q4: -18000) . But now I don't know what to do :frown:
    Last edited: Feb 4, 2010
  2. jcsd
  3. Feb 5, 2010 #2


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    Homework Helper

    Those fields are vectors. What are their directions?

  4. Feb 5, 2010 #3
    Last edited by a moderator: May 4, 2017
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