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*21. Find the unknown quantities for the circuits of Fig. 6.87
using the information provided.
10 V
I = 3 A
SECTION 6.6 Current Divider Rule
22. Using the information provided in Fig. 6.88, determine the
current through each branch using simply the ratio of parallel
resistor values. Then determine the total current IT. 23. Using the current divider rule, find the unknown currents
for the networks of Fig. 6.89.
(a)
I s = 100 mA I 1
2 A
R 1
64 V 1 k� R
500 mA
(c)
I
12 A
(a)
I 2
I 1
6 �
I 1
I 3
1 �
2 �
3 �
(c)
R 2
I 2
3 �
I 3
4 k�
E
FIG. 6.87
Problem 21.
I 4
I 3
I
R T
P = 30 W I 1
30 �
E R 2
6 A
FIG. 6.89
Problem 23.
I 1
2 A
(b)
(d)
I 1 = 6 A
I T
2 A I 2
6 �
P R2
4 �
I 2 12 �
I 3
I 4
2 �
40 �
9 �
FIG. 6.88
Problem 22.
8 � 8 � 6 � 6 � 6 �
I 4
18 �
4 �
(b)
(d)
I 2
12 �
I 2
I 3
I 1 = 4 A
I 4
PROBLEMS ⏐⏐⏐ 209
I T
I 3
R
P = 12 W
I 3
R 3 = R 2