Electric Circuit Analysis

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Wikiversity Electrical Engineering School
The Lessons in

SEE Wikipedia:Electric shock AND UNDERSTAND THE RISKS.

As little as 10 mA AC current can cause temporary paralysis and an inability to let go or withdraw from the current source. If the current bypasses the skin, as little as 10 uA may cause heart failure. Direct current is much less dangerous, unless voltages are high or there is direct connection bypassing the skin. Wet skin has lower resistance, never approach AC-mains-connected electrical equipment or wiring with wet skin or bare feet. Pay special attention to proper grounding of AC power plugs and of anything which may be, deliberately or accidentally, connected to a hot (energized) wire. With good grounding, an accidental short circuit is likely to blow a fuse or circuit breaker, instead of maintaining a shock hazard. Low-voltage circuits, up to 12 VAC or DC may be handled quite safely, as long as the skin is not bypassed (such as with wide contact -- such as grasping non-insulated pliers -- or wet skin, or a metal ring). Working with higher voltages requires serious caution.

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Course Brief & Outline

This is a Level 1 course in the school of Electrical Engineering. This course deals with the fundamentals of electric circuits, their components and the mathematical tools used to represent and analyze electrical circuits. By the end of the course, the student must be able to confidently analyze and build simple electric circuits.

It cannot be emphasized enough that as a foundation course it is important to understand the basics laid out in this course. Read carefully through given material and attempt all quizzes/questionnaires in this course.

Learn by doing, try out all home laboratories and don't forget to follow necessary precautionary measures.

Lessons in Electric Circuit Analysis← You are here Sweden road sign C2.svg
Lesson #1:
Passive Sign Convention Isimple system icons app edit.png
Lesson #2:
Simple Resistive Circuits Isimple system icons app edit.png
Lesson #3:
Resistors in Series Isimple system icons app edit.png
Lesson #4:
Resistors in Parallel Isimple system icons app edit.png
Quiz Test:
Circuit Analysis Quiz 1 Crystal Clear app help index.svg
Lesson #5:
Kirchhoff's Voltage Law Isimple system icons app edit.png
Lesson #6:
Kirchhoff's Current Law Isimple system icons app edit.png
Lesson #7:
Nodal Analysis Isimple system icons app edit.png
Lesson #8:
Mesh Analysis Isimple system icons app edit.png
Quiz Test:
Circuit Analysis Quiz 2 Crystal Clear app help index.svg
Home Laboratory:
Circuit Analysis - Lab1 Gartoon-Gnome-desktop-config.png

This Course in the Grand Scheme of things
Nuvola apps kcmsystem.png The Faculty of Engineering & Technology
Voltage.jpg School of Electrical Engineering
Books-aj.svg aj ashton 01.png Level 0: Entrance
Books-aj.svg aj ashton 01f.png Level 1: Freshman ← Sweden road sign C2.svg
Books-aj.svg aj ashton 01g.png Level 2: Sophomore
HILLGIALLO libro.png Level 3: Junior
HILLBLU libro.png Level 4: Senior
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By the end of the course a student must be comfortable with the following:

  • Circuit Variables
  • Circuit Elements
  • Simple Resistive Circuits
  • Techniques of Circuit Analysis
  • Kirchhoff's Voltage Law Problems
  • Kirchhoff's Current Law Problems
  • Nodal Analysis Problems
  • Mesh Analysis Problems


This is a level 1 course. It is assumed that the student has undertaken all currently available Level 0 courses. The following courses ( topics ) are recommended pre-requisite materials before registering/attempting this course.

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The following is based on the typical problem solving techniques and tricks that professors and tutors have reported as helpful in solving circuit analysis problems:

  • 1. Don't convert fractions until the last step in the problem
  • 2. Be able to re-derive any needed equation from the basic V=I*R and P=I*V equations
  • 3. Learn Cramer's rule
  • 4. Often KW are divided by mA so don't bother moving the decimal around to the end
  • 5. Draw every problem out
  • 6. Never forget the ground
  • 7. Try using symbols in working out your expressions and only substitute numbers at the final stage

If you keep your calculation parallel to your line of thought, then you will avoid many pitfalls.


Go to Your First Lesson

Your first lesson is about:

Passive Sign Convention

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Course Contacts

To email course co-ordinators, simply click one of the following:

  1. ThuvackClick Here to send me an e-mail
  2. The_Isiah
  3. BgorgesClick Here to send me an e-mail
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