电路原理（英文本）

1 Components, Quantities, and Units 5

1-1 Electrical Components and Measuring

Instruments 2

1-2 Electrical and Magnetic Units 6

1-3 Scientific Notation 8

1-4 Engineering Notation and Metric Prefixes 12

1-5 Metric Unit Conversions 15

2 Voltage, Current, and Resistance 22

2-1 Atomic Structure 24

2-2 Electrical Charge 27

2-3 Voltage 29

2-4 Current 33

2-5 Resistance 35

2-4 The Electric Circuit 44

2-7 Basic Circuit Measurements 51

2--8 Electrical Safety 59

Technology Theory into Practice 62

3 Ohm's Law 78

3-1 Ohm's Law 80

3-2 Calculating Current 82

3-3 Calculating Voltage 85

Calculating Resistance 88

3-5 The Relationship of Current, Voltage,

and Resistance 89

3-6 Introduction to Troubleshooting 92

Technology Theory into Practice 95

4 Ener and Power 106

4-4 Energy and Power 108

4-4 Power in an Electric Circuit 110

4-3 Resistor Power Ratings 112

4-4 Energy Conversion and Voltage Drop in

Resistance 116

4-5 Power Supplies 117

Technology Theory into Practice 120

5 Series Circuits 128

5-1 Resistors in Series 130

5-2 Current in a Series Circuit 132

5-3 Total Series Resistance 134

5-4 Ohma's Law in Series Circuits 138

5-5 Voltage Sources in Series 142

5-6 Kirchhoff's Voltage Law 145

5-7 Voltage Dividers 149

5-8 Power in a Series Circuit 156

5-9 Circuit Ground 158

5-10 Troubleshooting 162

Technology Theory into Practice 167

6 Parallel Circuits 184

6-1 Resistors in Parallel 186

6-2 Voltage in Parallel Circuits 189

6-3 Kirchhoff's Current Law 191

6-4 Total Parallel Resistance 195

6-5 Ohm's Law in Parallel Circuits 201

6-6 Current Sources in Parallel 205

6-7 Current Dividers 206

6-8 Power in Parallel Circuits 210

6-9 Examples of Parallel Circuit Applications 212

6-10 Troubleshooting 217

Technology Theory into Practice 222

7 Series-Parallel Circuits 238

7-1 Identifying Series-Parallel Relationships 240

7-2 Analysis of Series-Parallel Circuits 246

7-3 Voltage Dividers with Resistive Loads 253

7-4 Loading Effect of a Voltmeter 258

7-5 Ladder Networks 261

7-6 The Wheatstone Bridge 266

7-7 Troubleshooting 271

Technology Theory into Practice 275

8 Circuit Theorems and Conversions 294

8-1 The Voltage Source 296

8-2 The Current Source 298

8-3 Source Conversions 300

8.4 The Superposition Theorem 303

8-5 Thevenin's Theorem 310

8-6 Norton's Theorem 319

8-7 Maximum Power Transfer Theorem 323

8-8 Delta-to-Wye (A-to-Y) and Wye-to-Delta

(Y-to-A) Conversions 325

Technology Theory into Practice 331

9 Branch, Mesh, and Node Analysis 346

9-1 Branch Current Method 348

9-2 Determinants 351

9-3 Solving Simultaneous Equations Using

a Calculator 357

9-4 Mesh Current Method 359

9-5 Node Voltage Method 364

Technology Theory into Practice 367

10 MagneUsm and ElectromagneUsm 378

10-1 The Magnetic Field 380

10-2 Electromagnetism 384

10-3 Electromagnetic Devices 390

10-4 Magnetic Hysteresis 395

10-5 Electromagnetic Induction 397

10-6 Applications of Electromagnetic Induction 401

Technology Theory into Practice 405

11 Introduction to AlternaUng Current

and Voltage 414

11-1 The SineWave 416

11-2 Sinusoidal Voltage Sources 421

11-3 Voltage and Current Values of Sine Waves 424

11-4 Angular Measurement of a Sine Wave 428

11-5 The Sine Wave Formula 432

11-6 Ohm's Law and Kirchhoff's Laws in AC

Circuits 434

11-7 Superimposed DC and AC Voltages 437

11-8 Nonsinusoidal Waveforms 439

11-9 The Oscilloscope 446

Technology Theory into Practice 453

12 Phasors and Complex Numbers 468

12-1 Introduction to Phasors 470

12-2 The Complex Number System 475

12-3 Rectangular and Polar Forms 479

12-4 Mathematical Operations 486

Technology Theory into Practice 491

13 Capacitors 498

13-1 The Basic Capacitor 500

13-2 Types of Capacitors 507

13-3 Series Capacitors 513

13-4 Parallel Capacitors 518

13-5 Capacitors in DC Circuits 520

13-6 Capacitors in AC Circuits 529

13-7 Capacitor Applications 535

13-8 Testing Capacitors 540

Technology Theory into Practice 542

14 Inductors 556

14-1 The Basic Inductor 558

14-2 Types of Inductors 564

14-3 Series lnductors 565

14-4 Parallel Inductors 566

14-5 lnductors in DC Circuits 568

14-6 lnductors in AC Circuits 577

14-7 Inductor Applications 583

14--8 Testing lnductors 584

Technology Theory into Practice 585

15 Transformers 598

15-1 Mutual Inductance 600

15-2 The Basic Transformer 601

15-3 Step-Up Transformers 605

15-4 Step-Down Transformers 606

15-5 Loading the Secondary Winding 607

15-6 Reflected Load 609

15-7 Matching the Load and Source Resistances 611

15-8 The Transformer as an Isolation Device 614

15-9 Practical Transformers 616

15-10 OtherTypes of Transformers 619

15-11 Troubleshooting 624

Technology Theory into Practice 626

16 RC Circuits 638

Part 1: Series Reactive Circuits 64o

16-1 Sinusoidal Response of RCCircuits 640

16-2 Impedance and Phase Angle of Series

RC Circuits 641

16-3 Analysis of Series RCCircuits 644

Part 2: Parallel Reactive Circuits eS1

16-4 Impedance and Phase Angle of Parallel

RC Circuits 651

16-5 Analysis of Parallel RCCircuits 654

Part 3: Series-Parallel Reactive

Circuits 660

16-6 Analysis of Series-Parallel RC Circuits 660

Part 4: Special Topics 666

16-7 Power in RC Circuits 666

16-8 Basic Applications 670

16-9 Troubleshooting 681

Technology Theory into Practice 687

17 RL Circuits 706

Part 1: Series Reactive Circuits 708

17-1 Sinusoidal Response of RL Circuits 708

17-2 Impedance and Phase Angle of Series

RL Circuits 709

17-3 Analysis of Series RL Circuits 711

Part 2: Parallel Reactive Circuits 716

17-4 Impedance and Phase Angle of Parallel

RL Circuits 716

17-5 Analysis of Parallel RL Circuits 719

Part 3: Series-Parallel Reactive

Circuits 723

17-6 Analysis of Series-Parallel RL Circuits 723

Part 4: Special Topics 727

17-7 Power in RL Circuits 727

17-8 Basic Applications 730

17-9 Troubleshooting 738

Technology Theory into Practice 743

18 RLC Circuits and Resonance 758

Part 1: Series Reactive Circuits 76o

18-1 Impedance of Series RLC Circuits 760

18-2 Analysis of Series RLC Circuits 762

18-3 Series Resonance 766

Part 2: Parallel Reactive Circuits 773

18-4 Impedance of Parallel RLC Circuits 773

18-5 Analysis of Parallel RLC Circuits 775

18-6 Parallel Resonance 778

Part 3: Series-parallel Reactive

Circuits 782

18-7 Analysis of Series-Parallel RLC Circuits 782

Part 4: Special Topics 790

18-8 Bandwidth of Resonant Circuits 790

18-9 Applications 794

Technology Theory into Practice 798

19 Basic Filters 812

19-1 Low-Pass Filters 814

19-2 High-Pass Filters 821

19-3 Band-Pass Filters 826

Band-Stop Filters 830

Technology Theory into Practice 834

20 Circuit Theorems in AC Analysis 846

20-1 The Superposition Theorem 848

20-2 Thevenin's Theorem 853

20-3 Norton's Theorem 863

Maximum Power Transfer Theorem 867

Technology Theory into Practice 871

21 Pulse Response of Reactive Circuits 882

21-1 The RC Integrator 884

21-2 Single-Pulse Response of RC

Integrators 885

21-3 Repetitive-Pulse Response of RC

Integrators 890

21-4 Single-Pulse Response of RC

Differentiators 895

21-5 Repetitive-Pulse Response of RC

Differentiators 900

21-6 Pulse Response of RL Integrators 903

21-7 Pulse Response of RL Differentiators 908

21-8 Relationship of Time (Pulse) Response

to Frequency Response 911

21-9 Troubleshooting 914

Technology Theory into Practice 917

Polyphase Systems in Power

22 Applications 928

22-1 Basic Polyphase Machines 930

22-2 Polyphase Generators in Power Applications 932

22-3 Three-Phase Generators 938

22-4 Three-Phase Source/Load Analysis 943

22-5 Three-Phase Power 950

APPENDICES

A Table of Standard Resistor Values 959

B Batteries 960

C Derivations 963

O Capacitor Color Coding 966

Answers to Odd-Numbered Problems 970

Glossary 982

Index 989