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!

Vector B in Magnetic Potential Energy

  1. May 14, 2013 #1
    U = -m x B

    Is B the total magnetic field of the whole system?
    If there is two objects X,Z and they all have a magnetic field. But different strengths,
    I want to calculate the U for Z, B should be the total magnetic field of BOTH fields or only X's field strength?

    Since X is the external magnetic field.
     
  2. jcsd
  3. May 15, 2013 #2
    In the calculation of U = -m x B
    You should only take account of the EXTERNAL MAGNETIC FIELD acting on the magnetic moment.
    Meaning, if you'd like to figure out the U of Z, then only use the magnetic field of X.

    Similarly if you want to calculate U of X, then you use only the magnetic field of Z.

    I wonder, is the potential energy of both X and Z the same, I'll leave that up to you Phztastic.
     
  4. May 16, 2013 #3

    Meir Achuz

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    [itex]U=-m\cdot B[/itex] if U is the energy, m is a permanent magnet, and B is the external field.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Vector B in Magnetic Potential Energy
  1. Vector potential of B (Replies: 9)

Loading...