Find magnitude of current to produce magnetic field

  • Thread starter kgal
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  • #1
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Homework Statement


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?


Homework Equations


B=(μ0/4∏)∫I*dl X r^ / r^2


The Attempt at a Solution


Homework Statement





Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
tiny-tim
Science Advisor
Homework Helper
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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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