Unformatted text preview: used to connect it to two perfectly conducting electrodes (see Fig. on the right), for an arbitrary ratio b / a . Problem O.11 . Calculate (self)inductance of a toroidal solenoid with the crosssection shown in Fig. on the right ( r ~ R ), filled with a material of magnetic permeability , with N >> 1 wire turns uniformly distributed along the perimeter. Check your results by analyzing the limit r << R . Hint : You may like to use the following table integral MA (6.11): . 1 for , 1 1 1 ln 1 2 2 2 a a a d a a Problem 0.12 . A planar, uniform superconducting film of thickness t ~ L carries a finite supercurrent J per unit width. Use the London equation to find the current distribution over the film thickness. a b ? V I t I R r z 2 / V 2 / V 2 / V z h t...
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 Fall '08
 Stephens,P
 Magnetic Field, Optional Problems Set, perfectly conducting electrodes

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