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26. For the ladder network of Fig. 7.89:
a. Determine R T.
b. Calculate I.
c. Find I 8.
*27. Determine the power delivered to the 10-� load of Fig.
7.90.
*28. For the multiple ladder configuration of Fig. 7.91:
a. Determine I.
b. Calculate I 4.
c. Find I 6.
d. Find I 10.
SECTION 7.4 Voltage Divider Supply
(Unloaded and Loaded)
29. Given the voltage divider supply of Fig. 7.92:
a. Determine the supply voltage E.
b. Find the load resistors RL2 and RL3 .
c. Determine the voltage divider resistors R1, R2, and R3. E
I s = 72 mA
R 1
R 2
R 3
48 V
24 V
R L3
8 mA
R L2
FIG. 7.92
Problem 29.
12 mA
R L1
40 mA
1.6 k�
2 V
E
R 9
I
R T
24 V
12 �
R 8
12 �
R 1
4 �
12 �
R 2
2 �
R 3
4 �
R 5
1 �
FIG. 7.89
Problem 26.
7 � 2 �
4 �
12 �
FIG. 7.90
Problem 27.
R 7
3 � I
E
R 1
12 V
FIG. 7.91
Problem 28.
PROBLEMS ⏐⏐⏐ 251
R 6
4 �
R 4 2 � R 7 2 �
I10 R10 1 �
R11 3 �
24 �
R2 6 �
I4 R 8
1 �
2 �
2 �
R 12
I 8
R 3 = 1 �
R 4 10 �
R 6
P
10 �
2 �
R 5 = 6 �
I 6
4 �