ECR255 - AC Circuit Principles

Outline info
Last revision date 2018-07-20 11:28:51.275
Last review date 2018-07-20 11:29:03.017

Subject Title
AC Circuit Principles

Subject Description
This subject introduces AC network theory and includes such major topics as AC signal characteristics, AC response of R, L, and C components, impedance, series and parallel RLC circuit behaviour, series and parallel resonance, filters and AC applications

Credit Status
One subject credit in the Computer Engineering Technology program, Electronic Engineering Technology programs (ELN/ELM) and Electronic Engineering Technician programs (ELCB, ELCC, ELCM).

Learning Outcomes
Upon successful completion of this subject the student will be able to:

  1. Identify critical characteristics of sinusoidal AC signals
  2. Build and test simple passive AC circuits
  3. Using appropriate mathematics and concepts, explain the characteristics of passive electronics components and circuits under non-DC conditions
  4. Analyze the behaviour of simple passive AC circuits, including passive filters and RLC resonant circuits
  5. Determine the current, voltage, and impedance response characteristics as a function of frequency for passive sinusoidal AC circuits
  6. Select and use appropriate test and measurement instrumentation for the characterization and troubleshooting of AC circuits

Essential Employability Skills
Communicate clearly, concisely and correctly in the written, spoken and visual form that fulfils the purpose and meets the needs of the audience.

Respond to written, spoken, or visual messages in a manner that ensures effective communication.

Execute mathematical operations accurately.

Apply a systematic approach to solve problems.

Use a variety of thinking skills to anticipate and solve problems.

Manage the use of time and other resources to complete projects.

Take responsibility for one's own actions, decisions, and consequences.

Cheating and Plagiarism
Each student should be aware of the College's policy regarding Cheating and Plagiarism. Seneca's Academic Policy will be strictly enforced.

To support academic honesty at Seneca College, all work submitted by students may be reviewed for authenticity and originality, utilizing software tools and third party services. Please visit the Academic Honesty site on for further information regarding cheating and plagiarism policies and procedures.

All students and employees have the right to study and work in an environment that is free from discrimination and/or harassment. Language or activities that defeat this objective violate the College Policy on Discrimination/Harassment and shall not be tolerated. Information and assistance are available from the Student Conduct Office at

Accommodation for Students with Disabilities
The College will provide reasonable accommodation to students with disabilities in order to promote academic success. If you require accommodation, contact the Counselling and Disabilities Services Office at ext. 22900 to initiate the process for documenting, assessing and implementing your individual accommodation needs.

ETY155 & LIN155

Topic Outline

  1. Sinusoids and Non-Sinusoids
  2. Basic Elements & Phasors
  3. Series R, L, C AC Circuits
  4. Parallel and Series-Parallel R, L, C circuits
  5. Series and Parallel Resonance
  6. Filter Circuits

Mode of Instruction
Lecture hours: 3
Lab hours: 2
Total hours: 5

Prescribed Texts
Title:   Introduction to Electronic Circuits, 9th ed.
Author:   Jackson
Publisher:  Oxford
ISBN:  9780199020485

Required Supplies
ECR Lab Kit (from Sayal)

Promotion Policy

Grading Policy
A+ 90%  to  100%
A 80%  to  89%
B+ 75%  to  79%
B 70%  to  74%
C+ 65%  to  69%
C 60%  to  64%
D+ 55%  to  59%
D 50%  to  54%
F 0%    to  49% (Not a Pass)
EXC Excellent
SAT Satisfactory
UNSAT Unsatisfactory

For further information, see a copy of the Academic Policy, available online ( or at Seneca's Registrar's Offices.

Modes of Evaluation

  • Assignments are due at the beginning of the class on which they are due.
  • A late penalty of 10% per day is assessed for late assignments, including those not handed in at the beginning of class when due.
  • Material will not be accepted after one week following the due date and/or when the marked material is returned to students, whichever comes first.
  • Assignments are to be prepared by computer.

Absenteeism and Exams
  • Students should be aware that absenteeism almost guarantees an inability to achieve satisfactory grades.
  • Students who are absent for an examination due to an emergency (e.g., motor vehicle accident, hospitalization or death in the family) may provide official documentation within five days of the missed exam and be provided a deferred exam at a later date.  Official documentation includes a death notice or an original doctor’s certificate identifying the date, length of time expected absence and the specific reason for the absence.  Examinations missed without official documentation and approval result in a grade of zero.
  • There are no deferred options for missed tests.  The value of missed tests, at the discretion of the Faculty, will be added to other evaluation components

English Proficiency
  • All written work should demonstrate the following characteristics for clarity and conciseness:
-writing is consistent with the rules of English grammar
-spelling and punctuation are correct
-sentences are structured correctly
-main ideas are supported with specific, relevant examples and reasons
-work flows logically through supporting statements/paragraphs
-work is arranged in correct format (e.g., as a report, essay)
-up to 10% of the final grade may be deducted on all work if the above English competencies are not met.

Format for Assignments
  • Students must use the standard, APA style for quoting sources.   Help is available at:

Laboratory Attendance

The laboratory component is essential and therefore it is strongly recommended  that you attend all labs.  Any missed labs must be supported with a legal document with three days of the lab.  Any student who fails to attend 2 scheduled laboratory classes for a 7 week subject and more than 3 laboratory classes for a 14 week subject will not pass the subject.   

Laboratory Safety
Students are required to review and understand the safety procedures and guidelines outlined on the first class and sign the sheet to this effect before beginning work in the laboratory.  Students must also wear a lab coat and safety glasses when conducting experiments.
A student who arrives without the proper safety equipment will not be permitted to participant in the lab but will be asked to leave the class.  The student will receive no grade for the lab missed.

Lab Assignments                     10%
Quizzes                                        10%
Lab Test                                      35%
Midterm Test                               15%
Final Examination                      30%
Total - 100%

Note:  Students must pass both the theory portion and the lab portion of the course to be able to receive a passing grade.  Student can miss no more than three lab sessions if they are to receive a passing grade.

Approved by: Denis Gravelle