Unformatted text preview: notion of angular momentum conservation, what can you infer about electromagnetic Felds? 4. Purcell 7.28: Crude estimate of magnetic Feld decay in the earth (15 pts). 5. Self inductance per unit length of coaxial conductors (15 pts). A transmission line consists of a pair of nested, long cylindrical tubes with radii R 1 and R 2 : I I R R 1 2 The current I ±ows up the outer tube and down in the inner tube; these currents are uniformly distributed over their respective surface. Compute the self inductance per unit length of this conFguration. Hint: make life easy for yourself and do so using magnetic energy....
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- Spring '08
- Mass, Magnetic Field, Inductor, Purcell, Self Inductance