Quote:
Originally Posted by Kevin in NJ
Current is carried on the outer edge of the material. That is why larger power lines are hollow to reduce weight. In the end it is just surface area. This is something you get to do the math when you get physics or engineering courses.
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The skin effect only applies to alternating current. Direct current flows equally through a conductor. This is why DC is used a lot for magnetizing ferromagnetic objects for magnaflux inspection and for welding.