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Homework Help: Linear charge density (what equation?)

  1. Jul 15, 2012 #1
    Solved.
     

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    Last edited: Jul 15, 2012
  2. jcsd
  3. Jul 15, 2012 #2

    TSny

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    Hint: The total electric field at P is due to the vector sum of the fields from each rod.
     
  4. Jul 15, 2012 #3
    magnitude of 190.2 V/m, with components Ex = -34.23 V/m and Ey = -155.32 V/m.

    Oh, I didn't include this numbers before...didn't think they were applicable. Sorry, I'm stuck :(

    So, E = the above equation for lambda1 + lambda2?
     
  5. Jul 15, 2012 #4

    TSny

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    Try drawing a sketch of the individual E vectors from each rod at point P. These have to add as vectors to the total E. (You might have to allow for a negative charge density on a rod.)
     
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