(6)Jv=20R1=22,R2=402,oL1=292,ωL2=49,oM=12. Find (1)11 k--open; (2)11,12 k--close M+1 M M M+r⊥ (1)zc=6+j8=10∠531getv=20∠0°11=12=2∠-53.1° (R1+ joL111+ joM12=v 1=7.1∠-41.4°4 (R2+ joL2)12+ joM11=0 2=1.25∠70.2°A(1) ; (2) , . 20 2 , 4 , 2 , 4 , 1 . 1 1 2 1 2 1 2 Find I k open I I k close If V V R R L L M − − − − = =  =   =   =   =  • • • 1R k 1 L 2 R • V 2 L 1 • I 2 • I M − + − + • V 1R 2 R M 1 • I 2 • I ' 2 • I 1 L 2 L − + • V 1R 2 R 1 • I 2 • I ' 2 • I M+ L2 M+ L1 M− Zeq = + j =   Let V =  V I = I =  − A • • • (1) 6 8 10 53.1  20 0 1 2 2 53.1      +  +  = +  +  = • • • • • ( ) 0 ( ) (2) 2 2 2 1 1 1 1 2 R j L I j M I R j L I j M I V      =   =  −  • • I A I A 1.25 70.2 7.1 41.4 2 1 (6)