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Electric field in a cube

  1. Jan 15, 2007 #1
    1. The problem statement, all variables and given/known data

    A negative charge is contained by the cube in Figure Ex27.6 ( http://i137.photobucket.com/albums/q208/infinitbelt/p27-06.gif ), in which E1 = 13 N/C and E2 = 22 N/C. The electric field is constant over each face of the cube.

    2. The attempt at a solution

    Does the missing electric field vector on the front face point in or out? -I got this as it points in.

    What is the minimum possible field strength?

    I thought that it should be 8 NC as that would give -1 NC in the cube. What am I doing wrong?
  2. jcsd
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