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!

Dipole momentum of the electrons

  1. Sep 11, 2007 #1
    We know that same charges repel and opposite attract them selfs. So if the electrons have dipole magnetic momentum, how will they repel, if they get closer with their opposite poles of the dipoles? Thank you.
  2. jcsd
  3. Sep 12, 2007 #2

    Meir Achuz

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    In Classical EM, the Coulomb force between two electrons is repulsive and F_c~1/r^2.
    The magnetic dipole-dipole force can be repulsive or attractive,depending on their orientation, and F_m~1/r^4. This means that at close enough distances
    (less than about 10^-10 cm) the magnetic attraction could be larger.
    However, at such a short distance, quantum mechanics has to be used.
    It is true that at very high energies, where the electrons can come close together, the magnetic force dominates over the electric force.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook