Unformatted text preview: I and a . (b) Calculate the vector potential inside and outside the wires. You may solve the following equation: ∇ 2 A z = − µ J z , 1 r ∂ ∂r ( r ∂A z ∂r ) = { − µ J z r ≤ a, r > a (1) (c) Calculate the magnetic ﬁeld at a point outside the wires. (d) Calculate the magnetic energy of the system and determine the selfinductance from it. 7. Griﬃths, Problem 6.5 1...
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 Spring '09
 guang
 Energy, Magnetic Field, Kim Assignment

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