1. Basic electrical engineering

2. Circuit Analysis I OR Basic electrical engineering
Course Code EEN111
Pre-requisite None
Credit Hours 3+1
Assignments + Quizzes 25%
Midterm Examination 25%
Final Examination %
Floyd: Principles of Electric Circuits (Edition: 6th)
Robert L. Boylestad: Introductory Circuit Analysis
William H. Hayt: Engineering Circuit Analysis (Current Edition: 6th)
B.L. Theraja / A.K Theraja: A Text Book of Electrical Technology
Schaum’s Outline Series: Basic Electrical Engineering

3. Course Outline Electrical components
Electrical quantities and measurements
Resistor networks
Kirchhoff's Laws
Power sources
Theorems: Norton, Thevenin and superposition
Delta-Star networks
AC analysis and phasors
Capacitors and Inductors
RL, RC, RLC circuits and impedance analysis

4. Today’s Menu Electronic components Passive/Active components Charge
Voltage
Current
Units
Scientific notation and Metric system of units
Unit conversions

5. Electronic Components
An electronic component is any basic discrete device or physical entity in an electronic system used to affect electrons or their associated fields.
Two main types:
Active
Passive
Electronic Components

6. Passive electronic components
Cannot increase power or voltage level of a signal, hence cannot inject energy into the circuit.

7. Active electronic components
Can inject power into a circuit by itself or using another power source and hence can amplify a signal or change its power/voltage level.

8. Charge Can be positive (e.g. proton) or negative (e.g. electron)
There is a force between charges
Like Charges: repel (e.g. two electrons)
Unlike Charges: Attract (e.g. an electron and a proton)
Unit of charge is a coulomb
Massive unit: charge of an electron = × coulombs
Find the number of electrons required to have a charge of 1C?
6.24 × 1018

9. Electric current
Current (I) is the amount of charge (Q) that flows past a point in a unit of time (t).
One ampere is a number of electrons having a total charge of 1 C move through a given cross section in 1 s.
What is the current if 2 C passes a point in 5 s?
0.4 A

10. Voltage
Voltage (V) is the work (W) done per unit charge (Q); it is responsible for establishing current.
Work is done as a charge is moved in the electric field from one potential to another.
What is the applied voltage if 2 J of work is done on 0.5 C of charge to drive it between two points?
4 V

11. Voltage is responsible for establishing current.
One volt is the potential difference (voltage) between two points when one joule of work is used to move one coulomb of charge from one point to the other.
Voltage is responsible for establishing current.

12. Basic Units Quantity Unit Symbol length meter kilogram second ampere
Kelvin
candela
mole m kg s A K cd
mol
mass
time
electric current
temperature
luminous intensity
amount of substance

13. Some Important Electrical Units
Except for current, all electrical and magnetic units are derived from the fundamental units. Current is a fundamental unit.
current
charge
voltage
resistance
power
ampere
coulomb
volt
ohm
watt A C V W
Quantity Unit Symbol

14. Scientific and Engineering Notation
Very large and very small numbers are represented with scientific and engineering notation.
47,000,000 = 4.7 x 107 (Scientific Notation)
= 47.0 x 106 (Engineering Notation)
= 2.7 x 10-5 (Scientific Notation)
= 27 x 10-6 (Engineering Notation)

15. Engineering Metric Prefixes
Large numbers
Small numbers
peta
tera
giga
mega
kilo
1015
1012
109
106
103 P T G M k
10-3
10-6
10-9
10-12
10-15
milli
micro
nano
pico
femto m n p f

16. Metric Conversions Smaller unit 0.47 MW = 470 kW Larger number
When converting from a larger unit to a smaller unit, move the decimal point to the right. Remember, a smaller unit means the number must be larger.
0.47 MW = 470 kW
Larger number
Smaller unit

17. Metric Conversions Larger unit 10,000 pF = 0.01 mF Smaller number
When converting from a smaller unit to a larger unit, move the decimal point to the left. Remember, a larger unit means the number must be smaller.
10,000 pF = 0.01 mF
Smaller number
Larger unit

18. Metric Arithmetic 10,000 W + 22 kW = ? 10,000 W + 22,000 W = 32,000 W
When adding or subtracting numbers with a metric prefix, convert them to the same prefix first.
10,000 W + 22 kW = ?
10,000 W + 22,000 W = 32,000 W
10 kW + 22 kW = 32 kW
Alternatively,

19. Selected Key Terms Engineering notation Exponent Metric prefix
Scientific notation
A system for representing any number as a one-, two-, or three-digit number times a power of ten with an exponent that is a multiple of three.
The number to which a base is raised.
A symbol that is used to replace the power of ten in numbers expressed in scientific or engineering notation.
A system for representing any number as a number between 1 and 10 times a power of ten.

20. Quiz 1. A resistor is an example of a. a passive component
b. an active component
c. an electrical circuit
d. all of the above

21. Quiz 2. The electrical unit that is fundamental is the a. volt b. ohm
c. coulomb
d. ampere

22. Quiz 3. In scientific notation, the number 0.000 56 is written
a. 5.6 x 104
b. 5.6 x 10-4
c. 56 x 10-5
d. 560 x 10-6

23. Quiz 4. In engineering notation, the number 0.000 56 is written
a. 5.6 x 104
b. 5.6 x 10-4
c. 56 x 10-5
d. 560 x 10-6

24. Quiz
5. The metric prefix nano means
a. 10-3
b. 10-6
c. 10-9 d

25. Quiz
6. The metric prefix pico means
a. 10-3
b. 10-6
c. 10-9 d

26. Quiz 7. The number 2700 MW can be written a. 2.7 TW b. 2.7 GW
c. 2.7 kW
d. 2.7 mW

27. Quiz 8. The value 68 kW is equal to a. 6.8 x 104 W b. 68, 000 W
c MW
d. All of the above

28. Quiz 9. The sum of 330 mW + 1.5 W is a. 331.5 mW b. 3.35 W c. 1.533 W
d W

29. Quiz 10. The quantity 200 mV is the same as a. 0.000 200 V b. 20 mV
c V
d. all of the above

30. Quiz
Answers:
1. a
2. d
3. b
4. d
5. c
6. d
7. b
8. d
9. d
10. c