1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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) ).
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook