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Electric Potential Ranking Task

  1. Feb 10, 2008 #1
    In the figure (se attached) there are two point charges, +q and -q . There are also six positions, labeled A through F, at various distances from the two point charges.

    Rank the locations A to F on the basis of the electric potential at each point. Rank positive electric potentials as larger than negative electric potentials (left to right).

    Anyone who knows?
     

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  3. Feb 10, 2008 #2

    Doc Al

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    What have you done so far? (You must show your work to get help.)
     
  4. Feb 10, 2008 #3
    Well, i know that C and D have the same electric potential (because of their position to +q and -q). And B have greater potential than A, and i guess that E have greater than F.

    I guess this is right because of 1/r.

    If not maybe someone can explain it for me.
     
  5. Feb 10, 2008 #4

    Doc Al

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    Good. What does the potential equal at those points?

    Don't guess, figure it out. (The potentials at E and F are both negative; which is greater?) How does the potential at A & B compare with the potential at E & F?

    (You're doing good.)
     
  6. Feb 10, 2008 #5
    Hmm, well F should be greater, so the answere should be: B A C/D F E, or?
     
  7. Feb 10, 2008 #6

    Doc Al

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    Looks good to me!
     
  8. Feb 10, 2008 #7
    Excellent, thanks for your help :)
     
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