Basic Circuit Theory Chpter8 Problems I(a)Find V, in Fig. 8-20.(b)To what identical value should each of the 4Q2 resistors be changed so that V2 is 180 out of phase with the source voltage? 4 -j49+-j49+-j492 Fig 8-20 For prob. I 2 Find v3(t)in the circuit of Fig 8-21 by using nodal analysis 400uF √2 0130100n2" Fig 8-21 For prob. 2 3(a) Find i,(t)in the circuit of Fig 8-22.(b) Change the control voltage from 3v, to 3v, and again find i2(t) +[102cos 10tA 31 Imh Fig 8-22 For prob. 3 4 For the circuit of Fig 8-23 find v r(t) and v(t) F 106tA VLR2uH Fig 8-23 For prob. 4 5(a) Find the Thevenin equivalent of the network shown in Fig. 8-24a (b) Find the Norton equivalent of the network shown in Fig. 8-24b 0.oluF ①1v 0.2H 10kg2 104tA DaLian Maritime UniversityBasic Circuit Theory Chpter8 Problems 1 (a) Find in Fig.8-20. (b) To what identical value should each of the 4Ω resistors be changed so that is 180 o out of phase with the source voltage? • V2 • V2 DaLian Maritime University 50 + - + - 2 • / 0°V V 4 Ω 4 Ω − j 4 Ω − j 4 Ω 4 Ω − j 4 Ω Fig. 8-20 For prob.1. 2 Find v 3 (t) in the circuit of Fig.8-21 by using nodal analysis. ( - + A 1Ω 2 Ω 3 v 400 µF 0.4mH 3 i 10 2 cos 10 30 ) 4 t + ° 1Ω 1Ω 3 (a) Find i 2 (t) in the circuit of Fig.8-22. (b) Change the control voltage from 3v1 to 3v and again find i 2 (t). 2 Fig. 8-21 For prob.2. + - 3 - + + - 2 v A 1 v 2 i 10 2 cos 1 v t 4 10 20Ω 4mH 1mH 2µF Fig. 8-22 For prob.3. 4 For the circuit of Fig.8-23 find v (t) and v (t). R L + + - - 2 Ω L v R v F 4 1 µ 2A 2 cos t 6 10 A 2µH 5 (a) Find the Thevenin equivalent of the network shown in Fig.8-24a. Fig. 8-23 For prob.4. (b) Find the Norton equivalent of the network shown in Fig.8-24b. + - (a) (b) Fig. 8-24 For prob.5. a b 0.2H 80Ω 2H 0.01µF 50 2 cos t 3 10 10 kΩ a b t 4 10 A V 20 2 cos 1