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Homework Help: Charge Location

  1. Feb 12, 2009 #1
    1. The problem statement, all variables and given/known data
    In the figure, a point charge -3.2μ C is a distance d/2 directly above the center of a square of side d = 0.34 cm . What is the magnitude of the electric flux through the square? (Hint: Think of the square as on face of a cube with edge d.)
    (in N*m^2/C)


    2. Relevant equations



    3. The attempt at a solution
    Ok so I am not asking specifically for the solution, but when the charge is located a specific distance from a finite plane such as this, how does the distance from the square(d/2) play into the solution?
     
  2. jcsd
  3. Feb 12, 2009 #2
    Well since Flux = E dot dA, you need to find the Electric field going through the side of the square. So the distance from the square is r in the equation for an electric field due to a point charge ( E = kq/(r^2) ).
     
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