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Homework Help: Magnetic field and its energy?

  1. Sep 28, 2007 #1
    1. The problem statement, all variables and given/known data
    If a magnetic field has length 1m and strength 1T. What is its energy contained in it?

    3. The attempt at a solution
    I have no idea as I only know how to calculate energy from a volume basis.
  2. jcsd
  3. Sep 29, 2007 #2
    [tex]F=\frac{-dU}{dx}[/tex], If you solve for U, you get your general expression and plug in the values there.
  4. Sep 29, 2007 #3


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    This question looks nonsensical. Did you write it down exactly as it was given to you? Where is this from?
  5. Sep 29, 2007 #4
    The question was about the magnetic prominence which is a magnetic loop. I just simplified the data but its about a magnetic loop and finding how much energy it can contain.
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