214
Practical MATLAB
® Applications for Engineers
P.2.19 The current i C (t) through a capacitor C = 1 µF is shown in Figure 2.115.
Write a MATLAB program that returns the following plots:
a. The voltage v C (t) versus t
b. The energy W c (t) versus t over the range 0 ≤ t ≤ 10 s
P.2.20 The voltage across the inductor L = 1 mH is shown in Figure 2.116. Write a MATLAB
program that returns the following plots:
a. The current i L (t) versus t
b. The energy w L (t) versus t over the range 0 ≤ t ≤ 10 s
P.2.21 The RC circuit shown in Figure 2.117 presents an initial voltage v C (0) = 0 V at the
instant the switch closes at t = 0.
Write a program that returns the following plots over the range 0 ≤ t ≤ 5 s:
a. Current i(t) versus t
b. Voltage v R (t) versus t
c. Voltage v C (t) versus t
d. Energy w C in Joules stored in C versus t
e. Instantaneous power in watts dissipated by R versus t
FIGURE 2.119
Networks of P.2.23.
L 1
V
v L1
v L2
v C1
v C2
L 2
C 1
C 2
(b)
(a)
V
+
−
+
−
FIGURE 2.118
Network of P.2.22.
Switch closes at t = 0
L = 1 mH
R = 1 kΩ
100 V
i (t )
FIGURE 2.117
Network of P.2.21.
Switch closes at t = 0
R = 1 kΩ
C = 1 mF
100 V
i(t )
CRC_47760_CH002.indd 214
CRC_47760_CH002.indd 214
7/23/2008 1:39:03 PM
7/23/2008 1:39:03 PM