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!

Is this true?

  1. Aug 11, 2007 #1
    Moving electric field = magnetic field?
    http://img65.imageshack.us/img65/1958/untitledet8.jpg [Broken]
    Last edited by a moderator: May 3, 2017
  2. jcsd
  3. Aug 11, 2007 #2


    User Avatar
    Science Advisor
    Homework Helper

    how come you ask?
  4. Aug 13, 2007 #3

    This issue was thoroughly addressed in the above thread. Read through the entire thread and then we can discuss any questions you have. The crux of my contribution was Einstein's 1905 paper "On The Electrodynamics Of Moving Bodies".

    The long and short of it, according to Albert Einstein himself, was that the electric and magnetic fields mutually coexist, and neither is more "fundamental" than the other. The point that some fail to acknowledge is that there are 2 "static" conditions, namely electrostatic, and magnetostatic.

    A magnetostatic condition exists with a current carrying loop of steady (dc) value. A magnetic field surounds the wire, but there is zero electric field. This is with respect to the stationary reference frame. To an observer in a reference frame at motion wrt the rest frame (steady velocity, no acceleration), there will be an electric field as well as magnetic.

    An electrostatic condition exists when static charges are separated, such as a capacitor charged to a steady (dc) voltage. In the rest frame, an electric field exists, with zero magnetic field. In a moving reference frame, again constant velocity w/ no accelaration, both electric and magnetic fields exist.

    According to Einstein, neither the electric nor the magnetic field is the "seat". The term "seat" denoted the "root" or "basis" quantity. In conclusion, electric and magnetic fields are relativistically related.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook