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: Strength of electric fields

  1. Jul 8, 2011 #1
    1. The problem statement, all variables and given/known data
    lectric fields of varying magnitudes are directed either inward or outward at right angles on the faces of a cube, as shown in the figure.

    What is the strength and direction of the field on the face F? (The cube does not contain any charges. Take EA = 13 N/C, EB = 26N/C, ED = 22 N/C, and EE = 21 N/C.)

    3. The attempt at a solution

    I am not sure how to do this problem any hints? i you add up the flux but it doesn't have a direction in which the electric field is going so i am confused.

    Attached Files:

    • cube.PNG
      File size:
      13.9 KB
  2. jcsd
  3. Jul 8, 2011 #2
    Look at the picture to determine the sign of the flux. for arrows pointing outward take the flux to be positive, and inward to be negative. the direction is perpendicular to each face.
  4. Jul 8, 2011 #3
    arg i didn't look at the 10 which was C
    thanks !
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook