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===−zΦ1LIxdyIyIwyIIxydyxyawaawa=+−FHGIKJ==−−zz12222220000µπµπµπµπbgln.ThusLxwaa=−FHGIKJµπ0ln.P32.76For an RLcircuit,I tIeR L ta fbg=−max:I tIeRLtR L ta fbgmax=−=≅−−−11019RLt=−109soRmax....=××=×−−−3 1410102 503 16103 971089725ejejbgejyrs 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 0106 251023210...HAJafej(b)Two adjacent turns are parallel wires carrying current in the same direction. Since the loops
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