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Unformatted text preview: - 8Axbelow Y But E q 574 sa ys this e quals above below . .. aAz Z,8z inside the8z aAz - 8z fLoI- 8z r look fishy). V. = = B A ponIz = o. ,( v x A = -- aS cp= - cp= B. ,( y a outside solenoid; 27rS 0, = 8A~~,OW, 8A~7ove 8A~:e,ow -J.LoK.Thus the normalderivative the com{ /loK(-y). 80 8Atove and = of a )x ( ( _ ) ~ f .. B. 7rS2 . 98 (b) Here Ampere's law gives d . dl = B 27rs = fLolenc = fLoJ 7rS2 = fLoI 7r~2 8Aabove fL~:28Abelow CHAPTER = MAGNETOSTATICS 5. ffi K f J.Lo 2 more compact y: ... .K (the same A for aaA circular fLoI s solenoid-Ex. 5.9). fLoI 2 ponent 0 Isas parallel to K su ers a lscontmmty -J.Lo , or, 8n - 8n = -J.Lo . toroid, = B For the cpo as N/271"s= n (the number of turns per unit Problem p 5.33 9length), sooints) Griffiths 21!'=R2 ~ inside,- and zero outside, Here b IS agalll arbItrary, except that Slllce A .5 = 21!'R2Eq. 5.58 yields B roblem A .34 41!'R2 (s - b ) z. (15 P pon1 5 = Problem continuousProb. 3.33.) In(R/a) m = :;~2 f)f - b2), which means that wemsin()O (Fig. 5.54). Then (Same 5.34 Write = - (m. (R2 + only mcos()f - must pick a a...
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