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Unformatted text preview: Lecture Notes Page 2 3.2.2 Example: radius a cylindrical coordinates inside wire diameter a assume stationary situation: cylinder Energy flows from fields into cylinder through outer surface of wire: dynamic situation: quasi-static approximation dynamics with no external electromotive force: initially: I(0) => B-field from current I(t) E field from self induction => energy from outer fields enter conductor no energy left in field => all energy converted into u by Joule's heating law Poynting Vector: energy flow through surface Intensity: Lecture Notes Page 3...
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- Winter '09