1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

What is the potential difference VA-VB?

  1. Feb 20, 2006 #1
    Points A (3 m, 2 m) and B (6 m, 6 m) are in a
    region where the electric field is uniform and
    given by E = Exi + Eyj, where Ex = 3 N/C
    and Ey = 2 N/C.
    What is the potential difference VA-VB?
    Answer in units of V.

    I used E(rB-rA)

    sqr rt(13) times (sqr rt (72) - sqr rt (13)) = 17.59

    this is wrong. What am i doing wrong?
  2. jcsd
  3. Feb 20, 2006 #2
    Given the field do you know how to calculate the potential (difference) in terms of a line intergral?
  4. Feb 21, 2006 #3
    help within the hour is much appreciated... I'm thinking maybe it should be negative?
  5. Feb 21, 2006 #4


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    For a uniform E field, the potential difference is given by a scalar product (NOT a product of magnitudes!), [tex] \Delta V = - \vec E \cdot \vec r[/tex]

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: What is the potential difference VA-VB?
  1. Potential Difference (Replies: 2)