314
Practical MATLAB
® Applications for Engineers
P.3.20 Write a MATLAB program for each circuit shown in Figure 3.94 that returns the
following plots over 1 rad/s ≤ ω ≤ 150 K rad/s:
a. [Y(ω) = 1/Z(ω)] versus ω
b. ∠Y(ω) versus ω
P.3.21 Write a program for the circuit diagram shown in Figure 3.95 that returns the
voltage across R 2 = 2 Ω by using
a. Node equations
b. Loop equations
c. Thevenin’s theorem
d. Norton’s theorem
R 2 = 3 Ω
R 1 = 4 Ω
X L1 = j 3 Ω
X L2 = j 5 Ω
X C = −j 3
Z ()
FIGURE 3.93
Network diagram of P.3.19.
(a)
C = 1 F
L = 3 H
L = 3 H
R = 2 Ω
C = 1 F
(b)
R = 2 Ω
Y()
Y()
FIGURE 3.94
Network diagrams of P.3.20.
CRC_47760_CH003.indd 314
CRC_47760_CH003.indd 314
7/23/2008 1:27:55 PM
7/23/2008 1:27:55 PM
Practical MATLAB
® Applications for Engineers
P.3.20 Write a MATLAB program for each circuit shown in Figure 3.94 that returns the
following plots over 1 rad/s ≤ ω ≤ 150 K rad/s:
a. [Y(ω) = 1/Z(ω)] versus ω
b. ∠Y(ω) versus ω
P.3.21 Write a program for the circuit diagram shown in Figure 3.95 that returns the
voltage across R 2 = 2 Ω by using
a. Node equations
b. Loop equations
c. Thevenin’s theorem
d. Norton’s theorem
R 2 = 3 Ω
R 1 = 4 Ω
X L1 = j 3 Ω
X L2 = j 5 Ω
X C = −j 3
Z ()
FIGURE 3.93
Network diagram of P.3.19.
(a)
C = 1 F
L = 3 H
L = 3 H
R = 2 Ω
C = 1 F
(b)
R = 2 Ω
Y()
Y()
FIGURE 3.94
Network diagrams of P.3.20.
CRC_47760_CH003.indd 314
CRC_47760_CH003.indd 314
7/23/2008 1:27:55 PM
7/23/2008 1:27:55 PM