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Electric field strength of 4 charges positioned in a square shape

  1. Mar 27, 2014 #1
    1. The problem statement, all variables and given/known data
    Four charged particles are at the corners of a square of side a as shown in the figure below. (Let
    A = 3, B = 5 and C = 6.)

    NJQ487h.gif

    (a) Determine the electric field at the location of charge q. (Use the following as necessary: q, a, and ke.)
    (b) Determine the total electrostatic force exerted on q. (Use the following as necessary: q, a, and ke.)

    2. Relevant equations
    F=Eq


    3. The attempt at a solution
    Assuming that I have to solve this algebraically...
     
  2. jcsd
  3. Mar 27, 2014 #2

    Simon Bridge

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    Yeah - all they want is the resulting equation.
    You also need the equation for E. Don't forget E is a vector.
     
  4. Mar 27, 2014 #3
    I really have no idea how to solve this question...
     
  5. Mar 27, 2014 #4

    Simon Bridge

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    You know how to work out the force on the charge q?
     
  6. Mar 27, 2014 #5
    I have managed to do the first question.

    Not sure how to do the second one...
     
  7. Mar 27, 2014 #6

    Simon Bridge

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    The first one asks for the electric field - which you should have as a strength and direction.
    The second one asks you to find the force as a result - what is the relationship between electric field and the force on a charge?
    Hint: you gave the equation in post #1.
     
  8. Mar 28, 2014 #7
    God thinking too hard on a one question resulted in tunnel vision.

    Problem solved. Thank you.
     
  9. Mar 28, 2014 #8

    Simon Bridge

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    No worries.
     
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