ELEC 226, Spring 2010
Prof. Rich Kozick

Homework 6


Date Assigned: Thursday, February 25, 2010
Date Due: Tuesday, March 9 Thursday, March 11 , 2010

  1. Exam 1 will be on Tuesday, March 2. The exam topics will include Chapter 9 (sinusoidal steady-state circuit analysis) with emphasis on transformers (Sections 9.10, 9.11 and Lab 2, Lab 3), phasor diagrams (Section 9.12), and frequency-selective circuits (frequency response and Bode plots as in Lab 1 and Chapters 14, 15). The beginning of Chapter 10 (sinusoidal steady-state power) will also be included (Sections 10.1 through 10.3) with the topics of instantaneous power, average power, and rms values to compute average power (reactive power is excluded). The relevant homework assignments are 1, 2, 3, 4, and 5.

    The exam will be closed-book and closed-notes, but you can bring your calculator and one piece of 8.5" by 11" paper with notes and formulas. You can write on both sides of the paper.

  2. Reading: In the Nilsson/Riedel text, please continue to study Chapter 10. Also, please read the links about reactive power and power factor correction on the Class Notes page for this course.

    You should also look at Chapter 11 on three-phase circuits, but we will not discuss Chapter 11 in this course. (EE majors will study the topic in a senior course, ELEC 491.)

    We will study Chapters 7 and 8 after Spring Break. Please review Chapter 6 and begin reading Chapter 7, Sections 7.1 and 7.2, for the week after the break.

  3. Please solve the following problems in Chapter 10 and submit solutions in class on March 9 March 11:
    Problems 10.8 and 10.16:
    Equations (10.33), (10.36) for P and (10.34), (10.37) for Q are useful when computing the complex power for an impedance as in Figure 10.12.

    Problems 10.42, 10.49, and 10.61 on maximum power transfer:
    In Problem 10.61, the transformer circuit is identical to Problem 9.80(b), so you can use the result for Zab in that problem.

  4. There is no lab on Feb. 25 and March 4, and everyone will attend lab on Thursday, March 11.
Thank you.