boylistad

N A
4. Convert the voltage source of Fig. 17.61(a) to a current
source and the current source of Fig. 17.61(b) to a voltage
source.
+
E 1 = 10 V ∠ 0°
–
R
+
V
–
–
�V
+
4 � 8 �
(a)
6 �
R
4 k�
(� � = 16)
(a) (b)
SECTION 17.4 Mesh Analysis
5. Write the mesh equations for the networks of Fig. 17.62.
Determine the current through the resistor R.
6. Write the mesh equations for the networks of Fig. 17.63.
Determine the current through the resistor R 1.
+
E1 =
20 V ∠ 50°
–
R 1
12 �
12 �
E 2
(a)
3 �
+
60 V ∠ 70°
–
FIG. 17.61
Problem 4.
I
hI R 50 k�
(h = 50)
PROBLEMS ⏐⏐⏐ 781
+
R 50 � 20 �
E2 = 40 V ∠ 60° +
+
–
E1 = 5 V ∠ 30°
–
E2 –
20 V ∠ 0°
1 �
+
FIG. 17.62
Problems 5 and 34.
I =
6 A ∠ 0°
E3 = 40 V ∠ 0°
–
FIG. 17.63
Problems 6 and 16.
R 1
20 �
(b)
(b)
20 �
10 �
2 � 10 �
+
60 �
E = 30 V ∠ 0°
–