1. Limited time only! Sign up for a free 30min personal 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!

Zero potential?

  1. Sep 27, 2007 #1
    if the E-field is zero in a region of space, why i the potential always a constant?

    For example:

    [tex]V=-\int E dl [/tex]

    if E = 0, then wouldnt the potential automatically be zero?
  2. jcsd
  3. Sep 27, 2007 #2
    From Maxwell equations for stationary fields: [tex]\nabla \times E = 0 [/tex]
    it follows that E is gradient of some field. So we write [tex]E = -\nabla \phi [/tex].
    You see that if you change phi for a constant results the same field E.
    All it counts are the differences in phi. So potential can also be zero.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Zero potential?