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2 Electrostatics promblems. Need help please.

  1. Nov 14, 2006 #1
    Hi. I'am having trouble with 2 of my homework problems. Usually I do pretty good in physics but electrostatics unit turned out to be very confusing for me. I think I figured out all the other homework questions but these 2. I drew those out myself but I think they are pretty understandable.

    P.S. I'am also confused by Q. What exacly is Q and how it is defined? Any input will be appriciated. Thank you.

    Attached Files:

  2. jcsd
  3. Nov 14, 2006 #2


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    Staff: Mentor

    What equations have you been given for working with the electric field from a distribution of point charges (the Q's)? And what is the relationship between voltage potential difference and the electric field?
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