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!

Calculation of magnetic force

  1. Mar 14, 2010 #1
    this is a very low level question:

    I want to calculate the force that it is between two magnetic field .

    PLZ give me a formula of it for B1 & B2.
  2. jcsd
  3. Mar 14, 2010 #2


    User Avatar

    Staff: Mentor

    Magnetic fields don't exert forces on each other. Magnetic fields exert forces on moving charged particles, or on electric currents, or on magnetized objects.
  4. Mar 14, 2010 #3
    I know that but I say my question in bad way.

    mainly my question is about the force between two magnetized objects that have magnetic field (B1 & B2).
  5. Mar 14, 2010 #4
    Suppose the total magnetic energy stored in a system is

    W = (1/2μ0)∫B2 dVvolume

    Then the force in direction x is given by

    Fx = ∂W/∂x

    Bob S
  6. Mar 15, 2010 #5
    thank you.

    PLZ tell me that what 'a' & 'volume' means in a magnetic field?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook