256 InductanceP32.65(a)At the center,BNIRRR=+=µµ0222320202ej.So the coil creates flux through itselfΦBBARRNIR==°=coscosθµπ020202.When the current it carries changes,εLBNddtNNRdIdtLdIdt=−≈−FHGIKJΦ20soLNR≈220.(b)23 0 3r=. mafsor≈014. mLL≈×⋅=×−−214 100142810100277ejTmAmHnH..~(c)LR=×⋅=×−−28 1027010 1079..VsAVAsLR~1 nsP32.66(a)If unrolled, the wire forms the diagonal of a0.100 m (10.0 cm) rectangle as shown. The length ofthis rectangle is′L9800100m maf.′ L 0.100m9.80 mFIG. P32.66(a)The mean circumference of each turn is Cr=′2, where ′=+r24 0 0 6442mm is the meanradius of each turn. The number of turns is then:NLC=′=−+×=−4006442101273mmaf.(b)
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .