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Find magnitude of current to produce magnetic field

  1. Apr 1, 2012 #1
    1. The problem statement, all variables and given/known data
    Suppose that the magnetic field of the Earth were due to a single current moving in a circle of radius 1758 km through the Earth's molten core. The strength of the Earth's magnetic field on the surface near a magnetic pole is about 6. 10^-5 T. About how large a current would be required to produce such a field?


    2. Relevant equations
    B=(μ0/4∏)∫I*dl X r^ / r^2


    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Apr 1, 2012 #2

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    hi kgal! :wink:

    show us what you've tried, and where you're stuck, and then we'll know how to help! :smile:
     
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