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Homework Help: The magnitude of the electric field

  1. May 20, 2016 #1
    1. The problem statement, all variables and given/known data
    Calculate the magnitude of the electric field at the center of a square 42.5cm on a side if one corner is occupied by a −38.2μC charge and the other three are occupied by −27.0μC charges.

    2. Relevant equations

    3. The attempt at a solution
    E=k(q/r^2) the direction of the electric field will be towards the -38.2μC charge
  2. jcsd
  3. May 20, 2016 #2
    Superposition theorem: calculate the electric field magnitude separately for each 4 charges and then add them as vectors
  4. May 20, 2016 #3
    is there is any angles considered in analyzing the electric field
  5. May 20, 2016 #4
    Sorry, I don’t understand… Just calculate the four forces separately and add them. Your formula was correct
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