ET 152 Circuits 2


ET152 CIRCUITS 2 C 3, P 2, CR 4

This course details AC circuit analysis. Topics include Phasor representation of sinusoidal voltage, currents, impedance, power solution of RLC circuits, frequency response and series and parallel resonance. Three phase power transformers and Fourier analysis of complex waveforms are introduced. The use of computer solutions in problem solving is included.

Prerequisites: ET151 Circuits 1, ET153 Introduction to Electronics, ET154 Computer Programming or IS101 Introduction to Personal Computers.

Corequisite: MA122 Fundamentals of College Math 2.


Texts: Introductory Circuit Analysis 12E, R. Boylestad Prentice Hall Publishing Company
Equipment: A Scientific calculator with trig, exponential and polar to rectangular functions, preferably with simultaneous equation solutions using complex coefficients; hand tools sufficient to cut, strip and straighten hookup wire, a small screwdriver, and an electronic breadboard.

Laboratory Manual for AC Electrical Circuits (pdf)


The student will demonstrate a thorough knowledge of the AC steady state behavior of electrical circuits.

The student will demonstrate familiarity with the phasor solution of AC circuits and AC power relationships.

The student will demonstrate knowledge of the concepts of frequency response and series and parallel resonant circuits.

The student will use a mathematical and problem solving approach for circuit analysis, based on fundamental AC circuit principles and math concepts. This will include the use of computer simulations.

The student will demonstrate facility at constructing and trouble shooting basic AC circuits in the laboratory with proper use of test equipment.

The student will demonstrate appropriate communication skills, particularly technical reports through the laboratory.

The student will demonstrate the ability to work as part of a technical team, particularly in the laboratory.

Course Assessment Standards



This is the second in a sequence of two electrical circuits courses. Success in this course requires a good working knowledge of algebra and trigonometry, along with a thorough understanding of the concepts presented in ET151 Circuits 1. Simply stated, this course is an AC version of Circuits 1. Combination RLC circuits are examined in great depth. Topics include impedance, frequency response, and resonance. Three-phase power, transformers, and Fourier analysis of complex waveforms are introduced. If you do not already have one, purchase of a scientific calculator that will perform simultaneous equation solutions with complex coefficients is strongly advised. A minimum capability of 5 unknowns is desired. Examples include the TI-86 and TI-89. Further, smart devices will not be allowed during tests. Also, it will be helpful to bring a set of colored pencils or pens to lecture (3 or 4 colors) because we create numerous simultaneous waveform plots. For lab, you'll need the standard array of goodies as used throughout this program (breadboard, DMM, small handtools, hook-up leads, etc.) Unless otherwise specified, all lab exercises require a technical report due no later than one week after the exercise. Late penalty is one letter grade for the first half week, two letter grades for the second half week. Reports are not accepted beyond two weeks and receive a grade of 0. Remember, plagiarism is grounds for failure.

Link to the Boylestad website for more info, self-test materials, etc.

An on-line resource covering a variety of electrical circuit topics and reference material may be found at: www.allaboutcircuits.comCheck out my home page for free circuit simulators and other OER (Open Educational Resources).

Week-by-week progress and assignments
The problem numbers are for the 12th edition of the text. If you have another edition of the text, please note that there are some changes in the problem numbers. The laboratory manual may be downloaded as a doc or pdf file at the bottom of this page.


We introduce AC concepts of time varying quantities: sinusoidal functions and waveforms, and calculation of average and RMS value.

  • Reading: Last half of chapters 10 and 12, and first portion of chapter 13. Check out the Sine Wave Notes doc.
  • Problems: Chapter 10: 17, 21, 41, 43. Chapter 12: 23, 25. Chapter 13: 1, 5, 9, 15, 17, 18.
  • Lab: As always, we start the semester with proper lab safety procedures. Then we'll have a problem session on complex numbers: Phasor Problems.

We finish chapter 13 and launch into chapter 14 with an examination of reactance and impedance. Read the notes on Fourier Analysis and Overtones.

  • Reading: Finish chapter 13 by monday and begin chapter 14.
  • Problems: Chapter 13: 29, 41, 43. Chapter 14: 1, 7, 9, 13, 17, 23, 25.
  • Lab: The Oscilloscope

This week we introduce AC power and complex numbers. Complex numbers are extremely important- you can't do the remaining material without them, so make sure that you master the concepts.

  • Reading: Finish chapter 14.
  • Problems: Do first 6 problems from Weekend Fun Worksheet. Chapter 14: 29, 31, (The problems in the 40's are multi-part and may take a while. You must be able to do these. Consider it an investment in time) 41, 42, 43, 44, 45, 48, 49, 53.
  • Lab: Capacitive Reactance

We now begin elementary AC network analysis in chapter 15. The first topic is series networks.

  • Reading: Start chpater 15.Check out the series RL simulation doc.
  • Problems: Finish remaining problems from Weekend Fun Worksheet. Chapter 15: 1, 3, 5, 7 (hits all the bases), 15, 19, 21 (you'll be seeing this again in Op Amps and Telecom!), 25.
  • Lab: Inductive Reactance

This week we look at parallel networks and introduce series-parallel networks.

  • Reading: Finish chapter 15 and start chapter 16 by week's end.
  • Problems: Chapter 15: 27, 33, 39. Chapter 16: 1, 5.
  • Lab: Series RLC Circuits

We conclude with series-parallel networks and have a test.

  • Reading: Finish chapter 16.
  • Problems: Chapter 16: 9, 13.
  • Lab: Parallel RLC Circuits

Our next major topic is network theorems and analysis. This will be spread over a few weeks. This week we start with chapter 17 on methods of analysis (source conversions, dependent sources, mesh, nodal, etc.)

  • Reading: First portion of chapter 17.
  • Problems: Chapter 17: 1, 3, 5, 7 (imagine doing this entirely by hand), 15, 17. Start the Mesh, Nodal, et al. Worksheet.
  • Lab: Series-Parallel RLC Circuits

We finish off methods of analysis and begin network theorems (Superposition, Thevenin, Norton).

  • Reading: Finish chapter 17 and begin chapter 18.
  • Problems: Chapter 17: 35, 41. Chapter 18: 1, 12, 27. Continue the Mesh, Nodal, et al. Worksheet.
  • Lab: Passive Crossover

This week we conclude network theorems (Maximum Power Transfer, Substitution, etc). By mid-week we'll begin AC power.

  • Reading: Finish chapter 18 and read chapter 19.
  • Problems: Chapter 18: 39, 41, 45, 47. Chapter 19: 3, 5, 7, 11, 15, 17, 19. Finish the Mesh, Nodal, et al. Worksheet.
  • Lab: AC Superposition

We finish AC power this week and have a test. Then we begin another major topic: frequency response and resonance. We will be working through chapter 20 and 21 concurrently. Only a portion of chapter 21 will be examined, primarily as applications. The first item of interest is series resonance. 


This week we finish series resonance and start parallel resonance.

  • Reading: Finish chapters 20 and 21 (sections 7 and 8).
  • Problems: Chapter 20: 13, 15, 21, 25 (a good test of your knowledge) Chapter 21: 27, 31 (do plots in MultiSIM).
  • Lab: AC Maximum Power Transfer

When we have completed resonance, we begin with chapter 23, Polyphase Power.

  • Reading: Start chapter 23.
  • Problems: Chapter 23: 3, 5, 7, 11, 13
  • Lab: Series Resonance

We finish off polyphase power and begin an examination of magnetic circuits and transformers.

  • Reading: Finish chapter 23, read the first section of chapter 12 and start chapter 25.
  • Problems: Chapter 23: 19, 21, 27, 28, 32, 39 Chapter 25: 1, 5.
  • Lab: Parallel Resonance


We wrap up transformers and have our last in-class test (time permitting).

  • Reading: Finish chapter 25.
  • Problems: Chapter 25: 9, 13, 23, 25
  • Lab: Course review, or time permitting, computer simulation of series-parallel resonant circuits, mesh & nodal analysis or Loudspeaker Impedance Model.


Sine Wave Notes

Fourier Analysis 


Basic series RL MultiSim example using Transient Analysis

Weekend Fun Worksheet

Mesh, Nodal, et al. Worksheet

Parallel-Series Transform Proofs

Resonance Problems Worksheet


Laboratory Manual for AC Electrical Circuits (odt)

Laboratory Manual for AC Electrical Circuits (pdf)


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