ΦB= xHB2+ (D– x)HB1= DHB1+ xH(B2– B1) which means dΦBdt= dxdtH(B2– B1) = vH(B2– B1) ⇒i= vH(B2– B1)/R. Similar considerations hold (replacing “B1” with 0 and “B2” with B1) for the loop crossing initially from the zero-field region (to the left of Fig. 30-81(a)) into region 1. (a) In this latter case, appeal to Fig. 30-81(b) leads to 3.0×10− 6 A = (0.40 m/s)(0.015 m)B1 /(0.020 Ω) which yields B1= 10 µT. (b) Lenz’s law considerations lead us to conclude that the direction of the region 1 field is
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.