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2.1(a)23A2A23IR75R(b)3V2V23RUR47R2.2(b)1k3k5k20k20mA1U20k20mA(a)(b)+_2I2IUR(13)520(13)k//5kkk1359R220mA2mA20kRIR220k40VUI(a)13==30V1+3UU2.32R5k2325k5kRRR(1)32113130.05(2)40k(3)eqRUURRRRR(2)(3)138kR32kR3R(1)210k3R2.41820mA8mA(128)I2620mA12mA(46)IKCL128mA12mA4mAIII2.5(b)2.510A140100200120270160U1R10A2R(a)(b)1I2I3I1I2I1U3U1(140100)240R2(200160)120270360(200160)120R211210A6ARIRR21104AII(a)321201A360120IIKVL3131200100400VUUUII2.6xRRrRrxR1'12'23'3(a)xR5.75.7(b)1010......xRRrxR1'1(a-1)22'2.6aRr12.6(a)2xR22xR11xR4xR11xR,331xR,(a)(a-1)xxxrRRRrR2(4)/2xRRRRr2(4)/2xRRRRr(1)b(b)11'22'xRxR(b-1)(a-1)1xR107.5xR11'(b-1)2(4)/2xRRRRr210104107.5152xR15xR2.7(a)SIRSI(a-1)(a-2)(a-3)10V51A51A2A53A(a-1)(a-2)(a-3)(b)(b)5b-1b-3510A550V550V50V5100V(b-1)(b-2)(b-3)2.8(a)(1)(a-1)6A227I+_4V3A2(a-1)(2)212A24V2(a-2)27I+_4V27I+_4V19A9V1(a-2)(a-3)(3)(a-3)(a-3)(94)V0.5A(123)Ib(1)(b-1)(2)(b-2)(3)(b-3)I76V0.6I54I76V40.1I5476V5I0.5I(d)0.5I(b-1)(b-2)(b-3)KVL76V0.5(45)II76V/9.58AI2.9(a)30a-1a-2(a-1)(3040)352R(a-2)30403522R(b)(b)632,221,442(b-1)2.011322210.2242RR(b-1)(b-2)(b-1)(1/3)(b-2)10.21111242R2.10(a)(a)(b)(c)1010101010101I2IV3010101010101I2IV30101010101I2IV3010(a)(b)(c)R(b)1110(1010)20230V1.5ARIR2110.75A2II(d)(e)1010101I2I30V1031031031I30V53103105(d)(e)(e)130V1.5A(1010/355/3)I(d)210.75AA0.75A2I2.11SUSI1R2R3R4R1I2I3I4I1R2R3R4R5RSU1I2I3I4I5I6I4rI(a)(b)1m2m3m1m2m(a)KCL:1250III2360III3450IIIKVL1m:1122SRIRIU2:m3344SRIRIU3:m2233554RIRIRIrI(b)KCL:123SIIII2340IIIKVLKVL1122441:SmRIRIRIU22332:SmRIRIU2.12(a)(b)(a)23UKVL(b)3(a)KCL1230.1AIIIKVL1:m1210204VII2:m22050.1IU3:m350.1A102VIU(b)KCL1230.1AIIIKVL1:l1210204VII2:l2320102VII3:l350.1A102VIU2.134523110V5VI1mI2mI3mI1231213(123)2310V2(24)5V3(35)5VmmmmmmmIIIIIII12.326AmI21.61AmI31.71AmI120.717AmmIII2.143l1110lIIKVL23456110II1I12V1lI2lI3lI12312331(235)(35)50(35)(3465)(56)12V10llllllllIIIIIIII11AlI25AlI310AlI235AllIII2.15112I0.5xI2mI3mI1mIKVL1231233(0.51)(0.51)15V(10.5)(0.5121)302mmmmmmmIIIIIIIIIIm21mxII(0.51)(0.51)125V(10.5)(0.5121)320xxIIIIII5AxI2.16104050U8V2I1I-U121221(1040)408V-40I(4050)40()IIIII121250408V4(1)(94)0IIII504004(1)(94)7.252.17(a)(b)(a)(a)U12123(1020)204V10V20(2015)10V820mmmmmIIIIUIIU(1)230.1mmIIA(2)12mmIII(3)(1)(2)(3)12121232330206V203510V22800.1AmmmmmmmmmIIIIUIIIUII(b)(b)3mI0.1A(b)KVL12123(1020)204V10V(1)20(81520)8210V(2)mmmmmIIIIII12mmIII(3)30.1AmI(4)(3)(4)(1)(2)121230206V18419.2VmmmmIIII2.18147VnnUUU122334405V7V2V4V7V3V07V7VnnnnnnnUUUUUUUUUU2.1941VnU143VU315VU237VUKVL11443V1V2VnnUUU3431145V3V8VUUU33448V1V7VnnUUU22337V7V14VnnUUU2.2012(12)S(105)A(34)S(54AnnUUV3/51nU,V7/92nU120.38nnUUUV51.9WPU2.211A201A1211120V()1A10404040nnUU12111120V50V()404025504050nnUU114VnU210VnU1201A34VnUU1A34WPU2.221212323211111()()SnnSUUUIRRRRRR1223234211111()()SnnUUURRRRRR