电路英文习题库----CHAPTER8.pdf

文档介绍：Basic Circuit Theory
Chpter8 Problems
•
1 (a) Find V2 in -20. (b) To what identical value should each of the 4 Ω resistors be
•
o
changed so that V2 is 180 out of phase with the source voltage?
4 Ω 4 Ω 4 Ω
+
+
− j 4 Ω− j 4 Ω− j 4 Ω•
-
50/ 0°V V - 2

Fig. 8-20 For .
2 Find v 3 (t) in the circuit of -21 by using nodal analysis.
400 µF

1 Ω 1 Ω
10 2 cos +
4
(10 t + 30°)A 1 Ω v
i 3 3
2 Ω-


Fig. 8-21 For .
3 (a) Find i 2 (t) in the circuit of -22. (b) Change the control voltage from 3v 1 to 3v 2 and
again find i 2 (t).
2µF 20 Ω 4mH

i
+ 10 2 cos + 2
4 -
10 t A v
v 1 v 3 1
1mH 2
- +
-

Fig. 8-22 For .
4 For the circuit of -23 find v R (t) and v L (t).
2A

+
+ 2 cos 1
6 µF
10 t A 4 v L 2µH
v R
-
- 2 Ω


Fig. 8-23 For .
5 (a) Find the Thevenin equivalent of work shown in -24a.
(b) Find the Norton equivalent of work shown in -24b.

80Ω µF
a a

+
50 2 cos 10 kΩ 2H
- 10 3 t V 20 2 cos
4
10 t A
b b
(a) (b)
Fig. 8-24 For .

DaLian Maritime University
1
Basic Circuit Theory
Chpter8 Problems
6 Find the output impedance of work in -25.
12 Ω j 20 Ω
-
+ 1
v
x
− j 3 Ω

1 '
Fig. 8-25 For .
7 (a) Find the frequency-domain Norton eq