6 d c 27 the current io in fig 264 is a 4 a b

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Unformatted text preview: 4Ω a +− a 3V + − 5V −+ a a −+ b 3V + − 6Ω −+ Figure 2.63 b 1V 1V For Review Question 2.6. (d) (c) 2.7 The current Io in Fig. 2.64 is: (a) −4 A (b) −2 A (c) 4 A Figure 2.66 (d) 16 A For Review Question 2.9. 10 A 2.10 4A 2A The equivalent resistance of the circuit in Fig. 2.67 is: (a) 4 k (b) 5 k (c) 8 k (d) 14 k 2 kΩ 3 kΩ Io Req Figure 2.64 2.8 6 kΩ 3 kΩ For Review Question 2.7. In the circuit in Fig. 2.65, V is: (a) 30 V (b) 14 V (c) 10 V (d) 6 V Figure 2.67 For Review Question 2.10. 10 V + − Answers: 2.1c, 2.2c, 2.3b, 2.4c, 2.5c, 2.6b, 2.7a, 2.8d, 2.9d, 2.10a. 12 V + − + − + v v | | − Figure 2.65 V 8V For Review Question 2.8. e-Text Main Menu | Textbook Table of Contents | Problem Solving Workbook Contents CHAPTER 2 Basic Laws 63 PROBLEMS Section 2.2 Ohm’s Law 2.7 2.1 The voltage across a 5-k resistor is 16 V. Find the current through the resistor. 2.2 Find the hot resistance of a lightbulb rated 60 W, 120 V. 2.3 When the voltage across a resistor is 120 V, the current through it is 2.5 mA. Calculate its conductance. (a) Calculate current i in Fig. 2.68 when the switch is in position 1. (b) Find the current when the switch is in position 2. Determine the number of branches and nodes in the circuit in Fig. 2.71. 2.4 1 5Ω 2Ω 4Ω 3Ω i + − 3V Section 2.3 2.5 6Ω For Prob. 2.7. 150 Ω Section 2.4 Figure 2.68 10 V 2 Figure 2.71 100 Ω + − 5i i 2.8 For Prob. 2.4. Kirchhoff’s Laws Use KCL to obtain currents i1 , i2 , and i3 in the circuit shown in Fig. 2.72. Nodes, Branches, and Loops For the network graph in Fig. 2.69, find the number of nodes, branches, and loops. 12 mA i1 8 mA i2 i3 9 mA Figure 2.72 Figure 2.69 2.6 For Prob. 2.5. 2.9 For Prob. 2.8. Find i1 , i2 , and i3 in the circuit in Fig. 2.73. In the network graph shown in Fig. 2.70, determine the number of branches and nodes. 1A 2A 10 A i1 i2 3A i3 | v v Figure 2.70 | Figure 2.73 For Prob. 2.6. e-Text Main Menu | Textbook Table of Contents | For Prob. 2.9. Problem Solving Workbook Contents...
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This note was uploaded on 07/16/2012 for the course KA KA 2000 taught by Professor Bkav during the Spring '12 term at Cambridge.

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