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Old 2007-11-20, 14:55   #4
JHansen
 
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Apr 2004
Copenhagen, Denmark

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Quote:
Originally Posted by davieddy View Post
Unless he has "An exceptionally simple" explanation of how
the two may be related.
It comes from the way the author uses the Biot-Savart law. Given a vector field V, he looks at the magnetic field BS(V) that would be generated if V was a currentflow.
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