260 InductanceP32.75(a)It has a magnetic field, and it stores energy, so LUI=22is non-zero.(b)Every field line goes through the rectangle between the conductors.(c)Φ=LIsoLIIBdAyawa===−zΦ1LIxdyIyIwyIIxydyxyaa=+−FHGIKJ−−zz12222220000µπbgln.ThusLxa=−FHGIKJ0ln.P32.76For an RLcircuit,ItIeRLtaf=−max:IeRLtmax=−=≅−−−11019RLt=−109soRmax....=××=×−−−314 10102 503 16 10397 1089725ejejyrs yrΩ.(If the ring were of purest copper, of diameter 1 cm, and cross-sectional area 1 mm2, its resistancewould be at least 106−Ω).P32.77(a)ULIB×121250 050 0 106 25 1023210.H AJ(b)Two adjacent turns are parallel wires carrying current in the same direction. Since the loops
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