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: Electric field intenstity of a cube

  1. Aug 29, 2012 #1
    1. The problem statement, all variables and given/known data

    Eight point charges of 1ηC each are located at the corners of a cube in free space that is 1m on a side.Find |E| at the centre of a)the cube b)a face c)an edge.
    Can someone please help me with the solution of this problem??..

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Aug 29, 2012 #2

    Simon Bridge

    User Avatar
    Science Advisor
    Homework Helper

    Welcome to PF;
    It helps if you try to do a bit first, then we can target the specific area you need help.

    To get started - you know the equation for the field due to a single charge - you just add them up for all the charges, remembering that [itex]\vec{E}[/itex] is a vector.
    Hint: you can use the symmetry of the cube, with the fact that each corner has the same charge, to simplify the problem.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook