Chapter 1 Principles of Electric Circuits, Conventional Flow, 9 th ed.© Spring 2011 Elsarnagawy...

Chapter 1

Principles of Electric Circuits, Conventional Flow, 9th ed. © Spring 2011Elsarnagawy

Principles of Electric Circuit

207 MDE2010/2011 - 1431/1432

Spring 312

Tarek ElsarnagawyProf. assoc. Dr. Ing.

Tel.: 4735277 – 497 or 516Office hours: see time tableEmail: [email protected]

http://faculty.ksu.edu.sa/elsarnagawy/default.aspx

Lecture # 1

mailto:[email protected]

Chapter 1


Textbook

Principles of Electric Circuits: Conventional• Current Version, 9/E

Thomas L. Floyd

• ISBN-10: 013507309XISBN-13: 9780135073094

• Publisher: Prentice HallCopyright: 2010Format: Cloth; 992 ppPublished: 03/05/2009

• Boylestad, Introductory Circuit Analysis, 12/e

Chapter 1


Evaluation and assessment

• Assignments 5%• Seminars/oral 5%• Quizzes 5%• Practical 20%• Lab exam 10%• Mid term 1,2 15%• Final 40%

Chapter 1

Principles of Electric Circuits, Conventional Flow, 9th ed. © WS 2010 -Elsarnagawy

Course Syllabus

Chapter 1

Principles of Electric CircuitsMDE 207

© Spring 2011 -Elsarnagawy

► Chapter 1: Quantities and Units► 1-1 Units of Measurement► 1-2 Scientific Notation► 1-3 Engineering Notation and Metric

Prefixes► 1-4 Metric Unit Conversions► ► Chapter 2: Voltage, Current, and

Resistance► 2-1 Atomic Structure► 2-2 Electrical Charge► 2-3 Voltage, Current, and

Resistance► 2-4 Voltage and Current Sources► 2-5 Resistors► 2-6 The Electric Circuit► 2-7 Basic Circuit Measurements► 2-8 Electrical Safety► ► Chapter 3: Ohm’s Law► 3-1 The Relationship of Current,

Voltage, and Resistance► 3-2 Calculating Current► 3-3 Calculating Voltage► 3-4 Calculating Resistance► 3-5 Introduction to Troubleshooting► A Circuit Application

► Chapter 4: Energy and Power► 4-1 Energy and Power► 4-2 Power in an Electric Circuit► 4-3 Resistor Power Ratings► 4-4 Energy Conversion and

Voltage Drop in Resistance► 4-5 Power Supplies► A Circuit Application► ► Chapter 5 Series Circuits► 5-1 Resistors in Series► 5-2 Current in a Series Circuit► 5-3 Total Series Resistance► 5-4 Application of Ohm’s Law► 5-5 Voltage Sources in Series► 5-6 Kirchhoff’s Voltage Law► 5-7 Voltage dividers► 5-8 Power in Series Circuits► 5-9 Voltage Measurements► 5-10 Troubleshooting► A Circuit Application

5

Chapter 6 Parallel Circuits6-1 Resistors in Parallel6-2 Voltage in a Parallel Circuit6-3 Kirchhoff’s Current Law6-4 Total Parallel Resistance6-5 Application of Ohm’s Law6-6 Current Sources in Parallel6-7 Current Dividers6-8 Power in Parallel Circuits6-9 Parallel Circuit Applications6-10 TroubleshootingA Circuit Application

207 MASH, 312Course Syllabus

Chapter 1



207 MASH, 312Course Syllabus

► Chapter 12 Capacitors► 12-1 The Basic Capacitor► 12-2 Types of Capacitors► 12-3 Series Capacitors► 12-4 Parallel Capacitors► 12-5 Capacitors in DC Circuits► 12-6 Capacitors in AC Circuits► 12-7 Capacitor Applications► 12-8 Switched-Capacitor Circuits► A Circuit Application► ► Chapter 13 Inductors► 13-1 The Basic Inductor► 13-2 Types of Inductors► 13-3 Series and Parallel Inductors► 13-4 Inductors in DC Circuits► 13-5 Inductors in AC Circuits► 13-6 Inductor Applications► A Circuit Application

6

► Chapter 11 Introduction to Alternating Current and Voltage\

► 11-1 The Sinusoidal Waveform► 11-2 Sinusoidal Voltage Sources► 11-3 Sinusoidal Voltage and

Current Values► 11-4 Angular Measurement of a

Sine Wave ► 11-5 The Sine Wave Formula► 11-6 Introduction to Phasors► 11-7 Analysis of AC Circuits► 11-8 Superimposed DC and AC

Voltages► 11-9 Nonsinusoidal Waveforms► 11-10 The Oscilloscope► A Circuit Application

Chapter 1

Principles of Electric Circuits, Conventional Flow, 9th ed. © WS 2010 -Elsarnagawy

7

Quantities and Units

Chapter 1



Quantities and Units

► 1-1 Units of Measurement► 1-2 Scientific Notation► 1-3 Engineering Notation and Metric

Prefixes► 1-4 Metric Unit Conversions

8

Chapter 1



9

International System of Units “System International d’Unites”

SI Fundamental Units

Length Mass

Time

Electric current

Temperature

Luminous intensity

Amount of substance

Quantity Unit Symbol

Meter m

Kilogram kg

Second s

Ampere A

Kelvin K

Candela cd

Mole mol

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10

Some Important Electrical Units

CurrentCharge

Voltage

Resistance

Power

Ampere A

Coulomb C

Volt V

Ohm WWatt W

Except for current, all electrical and magnetic units are derived from the fundamental units. Current is a fundamental unit.

Quantity Unit Symbol

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11

Some Important Magnetic Units

All magnetic units are derived from the fundamental units. These units are discussed in Chapter 10.

Magnetic field intensity H

Magnetic flux fMagnetic flux density B

Magnetomotive force Fm

Permeability m

Ampere-turns/meter At/m

Weber Wb

Tesla T

Ampere-turn At

Webers/ampere-turns-meter Wb/At.m

Ampere-turns/weber At/WbReluctance R

Quantity Symbol Unit Symbol

Chapter 1



ENGINEERING NOTATION

►Engineering notation specifies that all powers of ten must be 0 or multiples of 3, and the tens unit must be greater than or equal to 1 but less than 1000.

Chapter 1



FIXED-POINT, FLOATING-POINT, SCIENTIFIC, AND ENGINEERING NOTATION

Prefixes

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14

Engineering Metric Prefixes

peta

tera

giga

mega

kilo

1015

1012

109

106

103

P

T

G

M

k

Can you name the prefixes and their meaning?

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15

Engineering Metric Prefixes

10-3

10-6

10-9

10-12

10-15

milli

micro

nano

pico

femto

m

m

n

p

f

Can you name the prefixes and their meaning?

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SYMBOLS

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17

Very large and very small numbers are represented with scientific and engineering notation.

Scientific and Engineering Notation

47,000,000 = 4.7 x 107 (Scientific Notation)

= 47. x 106 (Engineering Notation)

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18

0.000 027 = 2.7 x 10-5 (Scientific Notation)

= 27 x 10-6 (Engineering Notation)

0.605 = 6.05 x 10-1 (Scientific Notation)

= 605 x 10-3 (Engineering Notation)

Scientific and Engineering Notation

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19

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.

Metric Conversions

0.47 MW = 470 kW

Larger number

Smaller unit

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20

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.

Metric Conversions

10,000 pF = 0.01 mF

Smaller number

Larger unit

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21

When adding or subtracting numbers with a metric prefix, convert them to the same prefix first.

Metric Arithmetic

10,000 W + 22 kW =

10,000 W + 22,000 W = 32,000 W

Alternatively,

10 kW + 22 kW = 32 kW

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22

When adding or subtracting numbers with a metric prefix, convert them to the same prefix first.

Metric Arithmetic

200 mA + 1.0 mA =

200 mA + 1,000 mA = 12,000 mA

Alternatively,

0.200 mA + 1.0 mA = 1.2 mA

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23

Most work in electronics involves measurements, which always have error. You should report only digits that are reasonably assumed to be accurate.

Significant Figures

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24

Significant Figures

1. Nonzero digits are always considered to be significant.

2. Zeros to the left of the first nonzero digit are never significant.

3. Zeros between nonzero digits are always significant.

4. Zeros to the right of the decimal point for a decimal number are never significant.

5. Zeros to the left of the decimal point with a whole number may or may not be significant depending on the measurement.

152.71

0.0938

10.05

5.100

5100.

Looking at the rule, decide how many significant figures in each of the examples, which are given with a rule:

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25

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

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26

Quiz

2. The electrical unit that is fundamental is the

a. volt

b. ohm

c. coulomb

d. ampere

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27

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

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28

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

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29

Quiz

5. The metric prefix nano means

a. 10-3

b. 10-6

c. 10-9

d. 10-12

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30

Quiz

6. The metric prefix pico means

a. 10-3

b. 10-6

c. 10-9

d. 10-12

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31

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

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32

Quiz

8. The value 68 kW is equal to

a. 6.8 x 104 W

b. 68, 000 W

c. 0.068 MW

d. All of the above

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33

Quiz

9. The sum of 330 mW + 1.5 W is

a. 331.5 mW

b. 3.35 W

c. 1.533 W

d. 1.83 W

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34

Quiz

10. The quantity 200 mV is the same as

a. 0.000 200 V

b. 20 mV

c. 0.2 V

d. all of the above

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35

Answers:

1. a

2. d

3. b

4. d

5. c

6. d

7. b

8. d

9. d

10. a

Quiz

Chapter 1 Principles of Electric Circuits, Conventional Flow, 9 th ed.© Spring 2011 Elsarnagawy...

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