
182 Network Analysis and Synthesis
Example 5.7 Three voltage sources of 12 V,
13 V and 14 V having internal resistances of
1 Ω, 2 Ω and 3 Ω, respectively, are connected in
parallel as shown in Figure 5.27. What will be the
voltage available across their terminals?
Solution:
AB
=++×
V
R
V
R
V
R
RR R
1
1
2
2
3
3
123
1
111
Substituting the values, we calculate the voltage as follows:
AB
=+++
++
=++×
+
12
1
13
2
14
3
1
1
1
1
2
1
3
12 65 466
1
105
(..)
.
++
=×
=
033
23 16
1
183
12 7
.
.
.
. V
5.6 MAXIMUM POWER TRANSFER THEOREM
The power is supplied from the source to the load. Let the internal resistance of the source be
R
i
and the load resistance be R
L
.
Applying maximum power transfer ...