A typical transistor amplifier is shown in Fig. P2.122.

Determine the current and power dissipated in the resistor in Fig. P2.1. 9 V + 12 Figure P2.1

Determine the voltage across the resistor in Fig. P2.2 and the power dissipated.

In the network in Fig. P2.3, the power absorbed by Rx is 20 mW. Find Rx.

In the network in Fig. P2.4, the power absorbed by Gx is 20 mW. Find Gx. Figure P2.4

A model for a standard two D-cell flashlight is shown in Fig. P2.5. Find the power dissipated in the lamp. 1- lamp

An automobile uses two halogen headlights connected as shown in Fig. P2.6. Determine the power supplied by the battery if each headlight draws 3 A of current. 12 V + Figure P2.6

Many years ago a string of Christmas tree lights was manufactured in the form shown in Fig. P2.7a. Today the lights are manufactured as shown in Fig. P2.7b. Is there a good reason for this change? (a) (b) Figure P2.7

Find I1, I2, and I3 in the network in Fig. P2.8. 5 A 3 A A 6 A 2 A 4 A 8 A I2 4 A I3 I1

Find I1 in the network in Fig. P2.9. Figure P2.11 2.12 Find Io and I1 in the circuit in Fig. P2.12. Figure P2.12 2.11 Find I1 in the circuit in Fig. P2.11. 20 mA 6 mA 4 mA I1

Find I1 in the network in Fig. P2.10.

Find I1 in the circuit in Fig. P2.11.

Find Io and I1 in the circuit in Fig. P2.12. Figure P2.12

Find Ix, Iy, and Iz in the network in Fig. P2.13.

Find Ix in the circuit in Fig. P2.14

Find Ix in the network in Fig. P2.15

Find I1 in the network in Fig. P2.16

Find Vbd in the circuit in Fig. P2.17.

Find I1 in the network in Fig. P2.18.

Find I1, I2, and I3 in the network in Fig. P2.19. Figure P2.19

Find Vf b and Vec in the circuit in Fig. P2.20. Figure P2.20

Given the circuit diagram in Fig. P2.21, find the following voltages: Vda, Vbh, Vgc, Vdi, Vfa, Vac, Vai, Vhf, Vfb, and Vdc. Figure P2.21

Find VBE and VDA in the circuit in Fig. P2.22

Find Vx and Vy in the circuit in Fig. P2.23. Figure P2.23

Find Vac in the circuit in Fig. P2.24. Figure P2.24

Find Vad and Vce in the circuit in Fig. P2.25. Figure P2.22 A B E F D 6 V 6 V 8 V + + + 4 V VDA VBE + C 24 V 12 V + + 12 V 6 V 4 V 6 V + + + Vx + Vy + + abc 12 V 4 V Vx = 2 V 3Vx + + + + Figure P2.25

Find Vo in the circuit in Fig. P2.26. Figure P2.26

Find V1, V2, and V3 in the network in Fig. P2.27. Figure P2.27

Find Vo in the network in Fig. P2.28. Figure P2.28

Find V1, V2, and V3 in the network in Fig. P2.29. Figure P2.29

If Vo = 3 V in the circuit in Fig. P2.30, find VS. Figure P2.30

Find the power supplied by each source in the circuit in Fig. P2.31. Figure P2.31

The 10-V source absorbs 2.5 mW of power. Calculate Vba and the power absorbed by the dependent voltage source in Fig. P2.32. Figure P2.32

Find Vbd in the network in Fig. P2.33.

Find V1 in the network in Fig. P2.34. + Vx Vx 4 10 k 5 k 25 V V1 + + + Figure P2.34

Find the power absorbed by the dependent source in the circuit in Fig. P2.35.

In the network in Fig. P2.36, find Vx , VAE , and VBD if I = 3 A. Figure P2.36

In the network in Fig. P2.37, find VS if VEB = 6 V. Figure P2.37

Find VS in the circuit in Fig. P2.38, if VBE = 18 V. Figure P2.38

Find VA in the network in Fig. P2.39.

If the 12-V source in the network in Fig. P2.40 absorbs 36 W, find R and V0

If VX = 12 V in the network in Fig. P2.41, find VS and VBA. Figure P2.41 Figure P2.39 VA 12 V 4 V 1 2 2 1 + + + 24 V 12 V 1 1 + + + R Vo 2 1 + + VX 1 +

Calculate the power absorbed by the dependent source in the circuit in Fig. P2.42. Figure P2.42

Find VA and Vo in the circuit in Fig. P2.43. Figure P2.43

Find Vo and the power absorbed by the 2 k resistor in Fig. P2.44. Figure P2.44

Find the power absorbed or supplied by the 12-V source in the network in Fig. P2.45.

Find Vo in the circuit in Fig. P2.46.

Find Io in the network in Fig. P2.47. Figure P2.47

Find Io in the network in Fig. P2.48. Figure P2.48

Find the power supplied by each source in the circuit in Fig. P2.49. Figure P2.49

Find the current IA in the circuit in Fig. P2.50. Figure P2.50

Find VS in the network in Fig. P2.51.

Find Io in the circuit in Fig. P2.52. Figure P2.52

Find Io in the network in Fig. P2.53.

Find Vo in the circuit in Fig. P2.54.

Find Io in the network in Fig. P2.55. Figure P2.55

Find Io in the network in Fig. P2.56. Figure P2.56

Find Io in the network in Fig. P2.57. Figure P2.57

Determine IL in the circuit in Fig. P2.58. Figure P2.58

Find RAB in the network in Fig. P2.59. 6 k 2 k 3 k 4 k 1 k A B RAB

Find RAB in the circuit in Fig. P2.60. Figure P2.60

Find RAB in the circuit in Fig. P2.61. Figure P2.61

Find RAB in the network in Fig. P2.62.

Find RAB in the circuit in Fig. P2.63.

Find RAB in the network in Fig. P2.64.

Find RAB in the circuit in Fig. P2.65. Figure P2.65 Figure P2.64 RAB 2 k 6 k 6 k 6 k A B 2 k 2 k 4 k 4 k 2 k 2 k A B RAB 2 k 2 k 2 k 2 k

Find the equivalent resistance Req in the network in Fig. P2.66. Figure P2.66

Find RAB in the network in Fig. P2.67. Figure P2.67

Given the resistor configuration shown in Fig. P2.68, find the equivalent resistance between the following sets of terminals: (1) a and b, (2) b and c, (3) a and c, (4) d and e, (5) a and e, (6) c and d, (7) a and d, (8) c and e, (9) b and d, and (10) b and e. Figure P2.68

Determine the total resistance, RT, in the circuit in Fig. P2.69.

Determine the total resistance, RT, in the circuit in Fig. P2.70.

Determine the total resistance, RT, in the circuit in Fig. P2.71. Figure P2.71

Find the power supplied by the source in the network in Fig. P2.72. All resistors are 12 k. Figure P2.72

Find I1 and Vo in the circuit in Fig. P2.73. Figure P2.73

Find I1 and Vo in the circuit in Fig. P2.74. Figure P2.74

Find Vab and Vdc in the circuit in Fig. P2.75. Figure P2.75 + 4 3 1 2 2 5 20 V + Vab + a b c d Vdc

Find Io in the network in Fig. P2.76. 12 mA 12 k 12 k 12 k 6 k

Determine Io in the circuit in Fig. P2.77. Figure P2.77 Io 12 V 2 k 6 k 4 k 4 k 16 k 12 k

Find V1 in the network in Fig. P2.78. Figure P2.78

Find Vab in the circuit in Fig. P2.79. Figure P2.79 5 3 3 10 6 24 V + 8 V1 4 +

Find Vab in the network in Fig. P2.80. Figure P2.80

Find I1, I2, and V1 in the circuit in Fig. P2.81. 3 a b 5 3 2 3 2 4 5 A 6 6 Vab Figure P2.81 3 6 6 6 2 4 2 4 4 3 A V1 I1 I2

Determine Vo in the network in Fig. P2.82. Figure P2.82

Calculate VAB in Fig. P2.83. Figure P2.83 18 mA 3 k 5 k 1 k 30 mA + Vo 2 A A B 4 6 2

Find Io in the network in Fig. P2.84 if all resistors are 6 . 6 A Io

Find Io in the circuit in Fig. P2.85. Figure P2.85

Determine the power supplied by the 36-V source in the circuit in Fig. P2.86. Figure P2.86 72 k 18 k 36 V 72 k 54 k 12 k 18 k 6 k 3 k +

Find the power supplied by the current source in the network in Fig. P2.87. All resistors are 12 . Figure P2.87

In the network in Fig. P2.88, V1 = 12 V. Find VS. Figure P2.88 + 4 k 6 k 4 k 3 k 2 k 1 k VS

In the circuit in Fig. P2.89, Vo = 2 V. Find IS. Figure P2.89 IS 12 2 8 10 3 4 Vo +

In the network in Fig. P2.90, V1 = 14 V. Find VS. Figure P2.90

If VR = 15 V, find Vx in Fig. P2.91. Figure P2.91

Find the value of IA in the network in Fig. P2.92.

If V1 = 5 V in the circuit in Fig. P2.93, find IS. Figure P2.93

Given that Vo = 4 V in the network in Fig. P2.94, find VS. Figure P2.94

Find the value of VS in the network in Fig. P2.95 such that the power supplied by the current source is 0.

In the network in Fig. P2.96, Vo = 6 V. Find IS. Figure P2.96

Find the value of V1 in the network in Fig. P2.97 such that Va = 0.

Find the value of IA in the circuit in Fig. P2.98.

If the power supplied by the 2-A current source is 40 W, find VS and the power absorbed by the 5-V source in the network in Fig. P2.99. Figure P2.99

The 40-V source in the circuit in Fig. P2.100 is absorbing 80 W of power. Find Vx. Figure P2.100 10 20 10 6 5 5 A 3 A 40 V Vx + +

Find the value of the current source IA in the network in Fig. P2.101. Figure P2.101 + + 2 2 2 3 4 2 6 V 2 A + 4 V IA 6

Given Io = 2 mA in the network in Fig. P2.102, find VA. Figure P2.102

Find the value of Vx in the network in Fig. P2.103, such that the 5-A current source supplies 50 W.

Given Io = 2 mA in the circuit in Fig. P2.104, find IA. Figure P2.104

Given Vo in the network in Fig. P2.105, find IA.

Find the value of Vx in the circuit in Fig. P2.106 such that the power supplied by the 5-A source is 60 W. Figure P2.106

Find the power absorbed by the network in Fig. P2.107. Figure P2.107

Find the value of g in the network in Fig. P2.108 such that the power supplied by the 3-A source is 20 W. gIx 2 1 2 2 3 A Ix

Find the power supplied by the 24-V source in the circuit in Fig. P2.109. Figure P2.109

Find Io in the circuit in Fig. P2.110. Figure P2.110

Find Io in the circuit in Fig. P2.111. Figure P2.111

Determine the value of Vo in the network in Fig. P2.112. Figure P2.112 + 6 k 4 k 18 k 12 k 6 k 12 V + Vo

If Vo in the circuit in Fig. P2.113 is 24 V, find the value of IS. Figure P2.113 + + 4 5 4 12 V 2 16 V 2 A Vo = 24 V

Find the value of VS in the network in Fig. P2.114. Figure P2.114 + 8 V + VX 1 k 1 k 1 k 1 k 1 k + VS 2VX

Find the power supplied by the 6-mA source in the network in Fig. P2.115. Figure P2.115 12 k 12 k 4 k 12 k 6 mA 12 k

Find Vo in the circuit in Fig. P2.116. + IS 12 V 3 k 5 k 2000 IS Vo +

Find Vo in the network in Fig. P2.117. Figure P2.117

Find I1 in the network in Fig. P2.118. Figure P2.118

A single-stage transistor amplifier is modeled as shown in Fig. P2.119. Find the current in the load RL. Figure P2.119

Find Io in the circuit in Fig. P2.120. Figure P2.120

Find Vo in the circuit in Fig. P2.121. Figure P2.121

A typical transistor amplifier is shown in Fig. P2.122. Find the amplifier gain G (i.e., the ratio of the output voltage to the input voltage). Figure P2.122 2Iy Vo 6 A Vx Iy 2 1 + 2 Vx 2 + VS = 250 mV 100 300 4 k 4 105 Ib 5 k 500 Vo +

Find Vx in the network in Fig. P2.123

Find Vo in the network in Fig. P2.124. 2Vy 6 A Vo Vy 4Vx 2 2 + Vx 1 2 +

Find I1, I2, and I3 in the circuit in Fig. P2.125. Figure P2.125

Find Io in the network in Fig. P2.126. Figure P2.126

Find the power absorbed by the 12-k resistor on the right side of the network in Fig. P2.127. Figure P2.127

Find the power absorbed by the 12-k resistor in the network in Fig. P2.128. Figure P2.128

Find the value of k in the network in Fig. P2.129 such that the power supplied by the 6-A source is 108 W. Figure P2.129 6 A 6 3 6 12 4 kIo Io

If the power absorbed by the 10-V source in Fig. P2.130 is 40 W, calculate IS. Figure P2.130

If the power supplied by the 2-A current source in Fig. P2.131 is 50 W, calculate k. Figure P2.131 50 V 2 A + kI1 2 5 2 5 I 4 1