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Homework Help: Electric charge placed at a point

  1. Feb 7, 2006 #1
    http://img90.imageshack.us/img90/358/electricforce8yv.png [Broken]

    I know how to do the first question. The second question is what's troubling me. I don't know where the forces are supposed to be directed (i.e. to which charge)... basically i don't understand what I'm finding out.

    Any incite appreciated.
    Last edited by a moderator: May 2, 2017
  2. jcsd
  3. Feb 7, 2006 #2


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    There's a very simple relation that tells you the force acting on a charge placed in an electric field. What is it ?
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