# CHAPTER09 : NETWORK FUNCTION¶

## Example E24 - Pg 608¶

In [1]:
                             # EXAMPLE 9-24         PG NO-608-609
import math
L=20.;                          # INDUCTANCE
R=2.*L;                        # RESISTANCE
print '%s %.2f %s' %('i)  Resistance (R) is    =',R,'ohm');
Wo=math.sqrt(101.);
print '%s %.2f %s' %('ii)  Wo (Wo) is          =',Wo,'rad/sec');
Q=(Wo*L)/R;
print '%s %.2f' %('iii) Q  is               = ',Q);
BW=Wo/Q;
print '%s %.2f %s' %('iv) BANDWIDTH (BW) is    =  ',BW,' rad/sec  ');

i)  Resistance (R) is    = 40.00 ohm
ii)  Wo (Wo) is          = 10.05 rad/sec
iii) Q  is               =  5.02
iv) BANDWIDTH (BW) is    =   2.00  rad/sec


## Example E26 - Pg 609¶

In [2]:
                           # EXAMPLE 9-26            PG NO-609-610
C=10.** -6.;
X=5.*10.** 6.;
L=1./(C*X);
print '%s %.2f %s' %('i) INDUCTAR (L) is     =',L,' H  ');
R=10.*L;
print '%s %.2f %s' %('ii) Resistance (R) is  =',R,' ohm  ');
W=2.236*10.** 3.;
Q=(W*L)/R;
print '%s %.2f' %('iii) (Q) is            =  ',Q);
BW=W/Q;
print '%s %.2f %s' %('iv) Band Width (BW) is =',BW,' rad/sec  ');

i) INDUCTAR (L) is     = 0.20  H
ii) Resistance (R) is  = 2.00  ohm
iii) (Q) is            =   223.60
iv) Band Width (BW) is = 10.00  rad/sec


## Example E32 - Pg 618¶

In [3]:
                           # Example 9-32         PG NO 618-619
import math, cmath
P1=1-1j*50;
P2=1+1j*150;
Z1=0+0j*50;
I=(0.2*Z1)/(P1*P2);
print 'i) Current (I) is    =  ',I,'A'
L=5.;
R=10.;
C=2.*10.** -5.;
Wo=1/math.sqrt(L*C);
print 'ii) Wo (Wo) is    =  ',Wo,' rad/sec  '
Q=(Wo*L)/R;
print 'iii) Q (Q) is    =  ',Q;
BW=Wo/Q;
print 'ii) Band Width (BW) is    =  ',BW,' rad/sec  '

i) Current (I) is    =   0j A
ii) Wo (Wo) is    =   100.0  rad/sec
iii) Q (Q) is    =   50.0
ii) Band Width (BW) is    =   2.0  rad/sec


## Example E37 - Pg 623¶

In [4]:
                             # EXAMPLE 9-37             PG NO 623-624
C=1./8.5;                                  # Capacitor
L=1./(17.*C);                              # Inductar
print '%s %.2f %s' %('ii) Inductar (L) is    =  ',L,'H');
R=2.*L;                                  # Resistance
print '%s %.2f %s' %('ii) Resistance (R) is  =  ',R,' ohm  ');

ii) Inductar (L) is    =   0.50 H
ii) Resistance (R) is  =   1.00  ohm


## Example E38 - Pg 624¶

In [5]:
                         # EXAMPLE 9-38   PG NO=624-625
C=1./9.;                # CAPACITOR
X=2.;              # R/L=X
Y=6-X;             # G/C
G=4.*C;
print '%s %.2f %s' %('i) G (G)   =  ',G,' ohm')
L=0.9;
R=1.8;

i) G (G)   =   0.44  ohm


## Example E46 - Pg 630¶

In [6]:
                           # EXAMPLE 9-46            PG NO 630-631
import cmath
ZA=5+1j*3;
YA=1./ZA;
print 'i) Admittance (YA) is    =  ',YA,' siemens  ';
V=100.;                       # VOLTAGE
IA=V*YA;
print 'ii) Current (IA) is    =  ',IA,' A  ';

i) Admittance (YA) is    =   (0.147058823529-0.0882352941176j)  siemens
ii) Current (IA) is    =   (14.7058823529-8.82352941176j)  A


## Example E50 - Pg 632¶

In [7]:
                 # EXAMPLE 9-50            PG NO-632
I1=17.39-1j*4.66;         # CURRENT
I2=9+1j*15.68;           # CURRENT
I3=-1j*10.95;            # CURRENT
I=I1+I2+I3;
print 'i)CURRENT (I)   =  ',I,' A'

i)CURRENT (I)   =   (26.39+0.07j)  A


## Example E56 - Pg 636¶

In [8]:
                # example 9-56   pg no-636
Z1=8.05+1j*2.156;             # IMPEDANCE
XL=2.155;
W=5000;
L=XL/W;
print 'i)INDUCTANCE (L)   =  ',L,' H'
Z2=4.166-1j*7.216;          # IMPEDANCE
Xc=7.216;
C=1/(W*Xc);
print 'ii)CAPACITOR (C)   =  ',C,' F'
D=11.708;             # DIAMETER
XL1=12.81;
L1=XL1/W;
print 'i) INDUCTANCE (L1)   =  ',L1,' H'

i)INDUCTANCE (L)   =   0.000431  H
ii)CAPACITOR (C)   =   2.77161862528e-05  F
i) INDUCTANCE (L1)   =   0.002562  H