Engineering Principles for Electrical Technicians - 1st Edition - ISBN: 9780080129853, 9781483140308

Engineering Principles for Electrical Technicians

1st Edition

The Commonwealth and International Library: Electrical Engineering Division

Authors: K. M. Smith P. Holroyd
Editors: N. Hiller
eBook ISBN: 9781483140308
Imprint: Pergamon
Published Date: 1st January 1968
Page Count: 392
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Engineering Principles for Electrical Technicians serves as an introduction to basic engineering principles. This book discusses several topics, including rectifier equipment, pole systems, capacitors, electrical energy, and operating torque. Organized into 23 chapters, this book begins with an overview of the different applications of forces, including gravitational, friction, accelerating, shear, tensile, and compressive force. This text then defines the center of gravity as the point through which the resultant weight acts in whatever position the body is placed. Other chapters consider the efficiency, velocity, and mechanical advantage of simple machines. This book discusses as well the value of the factor of safety that depends on the material being used and the circumstances under which the material will work. The final chapter deals with thermionic emission that is concerned with the production of charged particles at a heated surface. This book is a valuable resource for electrical, mechanical, and telecommunications technicians.

Table of Contents



Symbols, Units and Abbreviations

1. Forces and Equilibrium

1.1Types of Force

1.2. Unit of Force

1.3. Effects of Forces

1.4. Equilibrium of Forces

1.5. Scalar and Vector Quantities

1.6. Representation of a Force

1.7. Addition of Forces; Resultant and Equilibrant

1.8. Vector Representation of Forces in Equilibrium

1.9. Resolution of Forces

1.10. Turning Effects of Forces

1.11. Unit of Moment

1.12. Principle of Moments

1.13. Beam Reactions

1.14. Friction

2. Center of Gravity

2.1. Definition

2.2. Calculation of Center of Area

2.3. Stability

3. Work, Power and Energy

3.1. Work

3.2. Units of Work and Energy

3.3. Work Diagram

3.4. Work Done in Rotation

3.5. Radian

3.6. Power

3.7. Horsepower Transmitted in Rotation

3.8. Measurement of Brake Horsepower for An Engine Or Motor

3.9. Simple Rope Brake

3.10. Energy

3.11. Potential Energy

3.12. Kinetic Energy

3.13. Conservation of Energy

3.14. Efficiency of Conversion

3.15. Evaluation of Potential Energy

3.16. Evaluation of Kinetic Energy Due to Linear Motion

3.17. Evaluation of Kinetic Energy Due to Rotation

4. Simple Machines

4.1. Mechanical Advantage, Velocity Ratio and Efficiency

4.2. Simple Machine Elements

5. Motion and Inertia

5.1. Motion

5.2. Speed-Time Graphs

5.3. Equations of Uniformly Accelerated Motion in a Straight Line

5.4. Motion under The Action of Gravity

5.5. Angular Motion 5.6. Momentum, Inertia, Mass, and Weight

5.7. Systems of Units

5.8. Comparison of Units

6 Elasticity

6.1. Hooke's Law

6.2. Stress

6.3. Strain

6.4. Young's Modulus of Elasticity

6.5. Maximum Stress

6.6. Factor of Safety

6.7. Material Behavior

7. Heat

7.1. Temperature

7.2. Conversion of Scales

7.3. Thermocouples

7.4. Radiation Pyrometer

7.5. Optical Pyrometer

7.6. Expansion of Solids by Heat

7.7. Thermostats

7.8. Transfer of Heat: Radiation, Conduction, Convection

7.9. Measurement of Heat Energy

7.10. Quantity of Heat

7.11. Specific Heat

7.12. Water Equivalent

8. States of Matter and Changes of State

8.1. States of Matter

8.2. Changes of State

8.3. Change of Boiling Point of Water with Pressure

8.4. Absolute Pressure

8.5. Sensible Or Liquid Heat

8.6. Latent Heat of Steam

8.7. Total Heat

9. Electrical Properties of Materials

9.1. Protons and Electrons

9.2. Conductors, Insulators, and Resistors

9.3. The Direction of Current

9.4. Insulating Materials

9.5. The Heating Effect of An Electric Current

10. Introduction to Electrical Units and Circuits

10.1. Coulombs and Amperes

10.2. Electromotive Force

10.3. Potential Difference

10.4. Measurement of Current and Voltage

10.5. Electrical Units of Power

10.6. The Commercial Unit of Electrical Energy

10.7. The Joule Or Newton-Meter

10.8. Unit of Mass in the Rationalized M.K.S. System

10.9. Heat Energy

10.10. Ohm's Law

10.11. Further Expressions for Power and Energy

10.12. Effect of Length on the Resistance of a Piece of Wire

10.13. Effect of the Cross-Sectional Area of a Wire on Its Resistance

10.14. Resistivity

10.15. Effect of Temperature on Resistance

10.16. Variation of the Resistance of a Metal Filament Lamp

10.17. Variation of the Resistance of a Carbon Filament Lamp

10.18. Tests on a Piece of Metrosil

10.19. Use of a Variable Resistor as a Potential Divider

11. Resistors in Series and Parallel

11.1. Resistors in Series

11.2. Resistors in Parallel

11.3. Mixed Series and Parallel Circuits

12. Primary and Secondary Cells

12.1. Primary Cells

12.2. The Wet Leclanché Cell

12.3. The Dry Leclanché Cell

12.4. Connection of Cells

12.5. The Standard Cell

12.6. The Mallory Mercury Cell

12.7. Secondary Or Storage Cells (Accumulators)

12.8. The Lead-Acid Cell

12.9. Measurement of the Internal Resistance of a Battery

12.10. Power Output of a Source of E.M.F.

12.11. The Nickelcadmium Alkaline Cell

12.12. Efficiency of Batteries

12.13. The Chemical Effect of An Electric Current

12.14. Faraday's Laws of Electrolysis

13. Magnetism

13.1. Introduction

13.2. The Bar Magnet

13.3. Force between Magnetic Poles

13.4. The Magnetic Field

13.5. The Magnetic Effect of An Electric Current

13.6. Electromagnets

13.7. Electromagnetic Induction

13.8. Lenzes Law

13.9. E.M.F. Induced in a Coil

13.10. Unit of Magnetic Flux

13.11. Unit of Magnetic Flux Density

13.12. Principle of the Transformer

13.13. E.M.F. Induced in a Moving Conductor

13.14. Force on a Conductor in a Magnetic Field

13.15. Fleming's Hand Rules

13.16. Magnetomotive Force (M.M.F.)

13.17. Magnetizing Force

13.18. Permeability of Free Space

13.19. Relative Permeability

13.20. Relationship between Flux and M.M.F.

13.21. Use of the Magnetization Curve

13.22. Magnetic Hysteresis

13.23. Inductance of a Coil Having a Non-Magnetic Core

13.24. The Effects of Applying a Voltage to a Coil

13.25. Mutual Inductance

13.26. Force between Parallel Conductors Carrying Current

13.27. Energy Stored in a Magnetic Field

14. Torque Production

14.1. General

15. Indicating Instruments

15.1. Moving-Coil Instruments

15.2.The Moving-Coil Instrument as Ammeter Or Voltmeter

15.3. Moving-Iron Instruments

15.4. Extension of Current and Voltage Ranges for A.C. Operation

15.5. Effect of Frequency on the Operation of Moving-Coil and Moving-Iron Instruments

15.6. Choice of Voltmeter

15.7. The Wheat Stone Bridge

15.8. a Commercial Wheat Stone Bridge

15.9. Effect of Ratio Arms on Resistance Measurement

16. Kirchhoff's Laws

16.1. General

16.2. Conventions

17. D.C. Two-Wire Distributors

17.1. General

18. Capacitors

18.1. General

18.2. Capacitors in Series

18.3. Capacitors in Parallel

18.4. Electric Field Strength

18.5. Electric Charge Density

18.6. Permittivity of Free Space

18.7. Capacitance of a Parallel Plate Capacitor

18.8. Relative Permittivity

18.9. Multiplate Capacitor

18.10. Maximum Working Voltage of a Capacito

18.11. Energy Stored in an Electric Field

19. Alternating Currents

19.1. Representation of Pole Systems

19.2. Generation of E.M.Fi

19.3. E.M.F. Waveform

19.4. Frequency

19.5. Multipolar Machine

19.6. Electrical and Mechanical Degrees

19.7. The Simple Alternator

19.8. Generation of a Sinusoidal E.M.F.

19.9. Average Value of a Waveform

19.10. Effective (Or R.M.S.) Value of a Waveform

19.11. Form Factor

19.12. Sinusoidal Alternating Voltage Applied to a Pure Resistor

19.13. Sinusoidal Alternating Voltage Applied to a Pure Inductor

19.14. E.M.F. Equation for a Pure Inductor

19.15. Inductive Reactance

19.16. Angular Velocity

19.17. Sinusoidal Alternating Voltage Applied to a Capacitor

19.18. Capacitive Reactanc

19.19. Power in Alternating Current Circuits

19.20. Volt-Amperes, Power, and Power Factor

19.21. Vector Or Phasor Representation of Sinusoidal Alternating Quantities

19.22. Resistor and Inductor in Series

19.23. Resistor and Capacitor in Series

19.24. A.C. and D.C. Voltages Applied to a Coil

19.25. The Dynamometer Wattmeter

20. Rectifiers

20.1. Introduction

20.2. Copper Oxide Rectifier

20.3. Selenium Rectifier

20.4. Semiconductor Point Contact Rectifiers

20.5. Junction Diode Rectifiers

20.6. Comparison of Rectifier

20.7. Protection of Rectifiers

20.8. Current and Voltage Outputs

20.9. Thyristors

20.10. Rectifier Circuits

20.11. Transistors

21. Electric Cables

21.1. General

21.2. Types of Insulation (Rubber)

21.3. Types of Insulation (Thermoplastics)

21.4. Other Types of Insulated Cables

22. Fuses

22.1. General

23. Thermionic Emission

23.1. Introduction

23.2. Space Charge

23.3. Experimental Determination of Diode Characteristics

23.4. Valve resistances


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© Pergamon 1968
eBook ISBN:

About the Author

K. M. Smith

P. Holroyd

Affiliations and Expertise

Visiting Fellow in the Technology Management Group, within the School of Engineering at Liverpool John Moores University.

About the Editor

N. Hiller

Ratings and Reviews