Page 51 - Circuit Analysis II with MATLAB Applications
P. 51
Exercises
4. In the circuit of Figure 1.24, the switch has been closed for a very long time and opens at t = . 0
S
Compute v t for t ! . 0
C
`
100 : 20 H S
v S t = 0
+ + v t
400 : C
1120 F
e
v = 100cos u t V
t
0
S
Figure 1.24. Circuit for Exercise 4
5. In the circuit of Figure 1.25, the switch S has been in position for closed for a very long time
A
and it is placed in position at t = 0 . Find the value of that will cause the circuit to become
B
R
critically damped and then compute v t and i t for t ! 0
L
C
3 : t = 0 R 6 :
A S
B
3H i t
L
+ + `
2 : v t
C
e
12 V 112 F
Figure 1.25. Circuit for Exercise 5
6. In the circuit of Figure 1.26, the switch has been closed for a very long time and opens at t = . 0
S
t
Compute v for t ! . 0
AB
S t = 0
2 : 4 :
+ A B
12 V ` 2H 14 F
e
Figure 1.26. Circuit for Exercise 6
1-39 Circuit Analysis II with MATLAB Applications
Orchard Publications
