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What is the magnetic field strength on Earth's surface at either pole?

  1. Oct 30, 2009 #1
    1. The problem statement, all variables and given/known data
    What is the magnetic field strength on Earth's surface at either pole?

    Earth's magnetic dipole moment is D_0

    What is the magnetic field strength on Earth's surface at either pole?

    B = ____ G

    2. Relevant equations
    _u = NIA ; N is the number of turns I is current, A is the corss sectional area


    3. The attempt at a solution

    I am not sure, they give _u = D_0, but U am not sure what to equate this to.
     
  2. jcsd
  3. Oct 31, 2009 #2
    Perhaps use the dipole field?
     
  4. Jul 3, 2011 #3
    http://en.wikipedia.org/wiki/Orders_of_magnitude_(magnetic_field [Broken])

    about .00006 tesla

    Doesn't give the pole strength, but probably has the data you want.
     
    Last edited by a moderator: May 5, 2017
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