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Homework Help: Quick electric potential question

  1. Feb 20, 2006 #1
    http://img69.imageshack.us/img69/6329/potential4iu.png [Broken]

    i thought the electric potenial would be larger at Va than at V0.


    Apparently I'm wrong. I thought since R=0 at the origin the electric potential would also be zero. Is that not the case?

    Can the electric potential even be determined?

    Or am i mixing it up with electric potential energy?
    Last edited by a moderator: May 2, 2017
  2. jcsd
  3. Feb 20, 2006 #2
    In the picture you attached, I think that the electric field is uniform
  4. Feb 20, 2006 #3
    How do u arrive at this conclusion?
  5. Feb 20, 2006 #4
    Because the lines of electric force are parallel
  6. Feb 20, 2006 #5
    =( apparently that's incorrect. It's either V0>VA or "cannot be determined"

    I really need to get the answer right... since it's a multiple choice question -- -6.67 is my current score(negative)... if it's right i'll get -3.33 or -10 if it's wrong.
  7. Feb 20, 2006 #6
    As the picture shows, we have [tex]V_0>V_A[/tex] and because we don't know [tex]V_A[/tex], so we can calculate [tex]V_0[/tex]. If we know [tex]V_A[/tex] we can calculate [tex]V_0[/tex] by this method [tex]V_0=V_A+Ex[/tex] where [tex]x[/tex] is the position of point A in the x-axis.
    Last edited: Feb 20, 2006
  8. Feb 20, 2006 #7
    Thanks. That helps. :approve:
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