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Fellowroot
 2 years ago
In my electrodynamics book. Griffiths 3rd. p223. I see these equations.
Fellowroot
 2 years ago
In my electrodynamics book. Griffiths 3rd. p223. I see these equations.

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Fellowroot
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1349651446004:dw

Fellowroot
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1349651568212:dw

Fellowroot
 2 years ago
Best ResponseYou've already chosen the best response.0well I think it kind of makes a little sense now. but I don't get why there are all of these dots and crosses. why after divergence is there an integral of a del dot of a cross product. to me that is very confusing.

Fellowroot
 2 years ago
Best ResponseYou've already chosen the best response.0Well at least I think I see the math now. Finally, you know sometimes you have write it down and really look at it for it to make sense.

Fellowroot
 2 years ago
Best ResponseYou've already chosen the best response.0But still why is the biot savart law some integral of a cross product. And how did we turn an integral into a nonintegral? How did they do that?

Jemurray3
 2 years ago
Best ResponseYou've already chosen the best response.0The BiotSavart law was mostly pieced together from experimental observation. The cross product is a result of the fact that the direction of the magnetic field is perpendicular to the piece of current that creates it.
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