Electric

Topics: Alternating current, Electrical engineering, Direct current Pages: 17 (836 words) Published: September 23, 2014
Fundamentals of Electric
Circuits (EE201)
By
Dr. Eng. Omar Abdel-Gaber M. Aly
omar.aly@aun.edu.eg
Assistant Professor
Electrical Engineering Department
College of Engineering Al-Majmaa
Al-Majmaa University

Schedule & Instructors


Schedule:



As indicated in Students Schedule

Instructors: Dr. Omar Abdel-Gaber



(omar.aly@aun.edu.eg)
Office hours: Saturday (01:02 pm),
or by appointment.



TAs:




Eng. Mohamed AbdelRaheem
Office hours: As indicated in Students Schedule

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Fundamentals of Electric Circuits EE201, by Dr. Omar Aly

Recommended Texts
“Fundamentals of Electric Circuits”
Author: Charles Alexander, Matthew Sadiku, 2008

3
Fundamentals of Electric Circuits EE201, by Dr. Omar Aly

Grading


EE201 Grade breakup:







First Midterm exam :
20
Second Midterm exam :
20
Quizzes (4 or 5 times) :
5
Class Attendances:
5
Lab and Exercises
10 Total 60
Extra Grade:
10
 Presentations:
5
 Hardware Implementations:
5
 (groups of maximum 4 Persons are allowed)

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Fundamentals of Electric Circuits EE201, by Dr. Omar Aly

Contents of the Course










Basic circuit elements and concepts.
Basic laws of circuit theory: Ohm's law,
Kirchoff's law.
Circuit theorems: superposition principle,
Thevenin and Norton theorems; maximum
power transfer theorem.
Techniques of circuit analysis: Nodal and
mesh analysis.
Sinusoidal sources and the concept of
phasor in circuit analysis.
Introduction to concept of active, reactive,
complex power and power factor.
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Fundamentals of Electric Circuits EE201, by Dr. Omar Aly

Introduction


An electric circuit is an interconnection of electrical
elements. Electric circuits range from very simple to
complicated circuits as shown. The purpose of this
course is to analyze these circuits.

Fundamentals of Electric Circuits, by Dr. Omar Aly

6

SYSTEMS OF UNITS

Fundamentals of Electric Circuits, by Dr. Omar Aly

7

POWER OF TEN NOTATION
Electrical values vary tremendously in size. In
electronic systems, for example, voltages may
range from a few millionths of a volt to several
thousand volts, while in power systems, voltages
of up to several hundred thousand are common.
To handle this large range, the power of ten
notation.
 To express a number in power of ten notation,
move the decimal point to where you want it,
then multiply the result by the power of ten
needed to restore the number to its original
value.


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Fundamentals of Electric Circuits, by Dr. Omar Aly

EXAMPLE

247000 = 247000 =2.47 x

5
10

5 4 3 2 1

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Fundamentals of Electric Circuits, by Dr. Omar Aly

PREFIXES
Express the following in
engineering notation:
a. 10x104 volts b. 0.1x10-3 watts
c. 250x10-7 seconds
 Solution
a. 10x104 V = 100x103V
= 100 kV
b. 0.1x10-3 W = 0.1 mW
c. 250x10-7 s = 25x 10-6 s
= 25 s


Fundamentals of Electric Circuits, by Dr. Omar Aly

10

CHARGE AND CURRENT







Charge is an electrical property
of the atomic particles of which
matter consists, measured in
coulombs (C).
Electric current is the time rate
of change of charge, measured
in amperes (A).
A direct current (dc) is a current
that remains constant with time.
An alternating current (ac) is a
current that varies sinusoidally
with time.
Fundamentals of Electric Circuits, by Dr. Omar Aly

11

VOLTAGE


Voltage (or potential difference) is the energy
required to move a unit charge through an
element, measured in volts (V).



where w is energy in joules (J)



vab = - vba



Like electric current, a constant voltage is called
a dc voltage and is represented by V, whereas a
sinusoidally time-varying voltage is called an ac
voltage and is represented by v.
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Fundamentals of Electric Circuits, by Dr. Omar Aly

POWER AND ENERGY


Power is the time rate of expending or absorbing
energy, measured...
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