Homework #3. Nodal Analysis

• Read Appendix A and Sections 3.1 to 3.3 of Alexander & Sadiku's Fundamentals of Circuit Analysis (6th edition).
• Make sure you understand the answers to Review Questions 3.1 and 3.2 on page 111. Quiz questions will be similar to these Review Questions or Review Questions from earlier chapters.
• Turn in solutions to Problems 3.2, 3.3*, 3.10**, 3.11***, 3.13****, and 3.18***** on pages 112 to 124.
• *Typo in the book's answer to Problem 3.3: The fourth current value is wrong. Instead of 1 A, the answer should be −1 A.
• **Hint for Problem 3.10. Don't be scared by the dependent current source in this problem. This source's current is 2Io, where Io is the current through the 8-Ω resistor. So simply use Ohm's law to rewrite 2Io in terms of that resistor's resistance and a node voltage.
• ***Typo in the book's answer to Problem 3.11: The first power value is wrong. Instead of 293.9 W, the answer should be 270.75 W.
• ****Hint for Problem 3.13.  This circuit contains another node that the authors have not labeled.  It's at the intersection of the 10-Ω resistor and the 600-V source.  Let's call this node 3, and its voltage will be v3.  When you draw a supernode around the voltage source, include nodes 2 and 3 within the supernode.  But do not include the 10-Ω resistor, since it's not in parallel with the voltage source.
• *****Hint for Problem 3.18.  When you draw a supernode around the voltage source, include nodes 1 and 3 within the supernode.  But do not include any resistors, since none of them are in parallel with the voltage source.
• For the odd-numbered problems, check yourself against the answers given in Apppendix D.