An Introduction to Electrical Science

Heavily updated and expanded, this second edition of Adrian Waygood’s textbook provides an indispensable introduction to the science behind electrical engineering. While fully matched to the electrical science requirements of the 2330 levels 2 and 3 Certificates in Electrotechnical Technology fromCity & Guilds (Electrical Installation), the main purpose of this book is to develop an easy understanding of the how and why within each topic. It is aimedat those starting careers in electricity and electronics, as well as any hobbyists, with an array of new material to reflect changes in the industry. New chapters include: Electrical drawings Practical resistors Measuring instruments Basic motor action Practical capacitors Basic transformer theory The electricity supply industry …and more The author details the historical context of each main principle and offers a wealth of examples, images and diagrams, all whilst maintaining his signature conversational and accessible style. There is also a companion website, with interactive multiple choice quizzes for each chapter and more, at www.routledge.com/cw/waygood

Foreword. Introduction. SI System of Measurements. Electrical Schematic and Wiring Diagrams. The 'Electron Theory' of Electricity. Electric Current. Potential and Potential Difference. Resistance. Resistors. Conductors and Cables. Effect of Temperature-Change upon Resistance. Ohm’s Law of Constant Proportionality. Series, Parallel and Series-Parallel Circuits. Electrical Measurements. Cells and Batteries. Internal Resistance. Energy, Work, Heat and Power. Magnetism. Electromagnetism. Magnetic Circuits. Electromagnetic Induction. Motor Principle. Transformers. Capacitance. Capacitors. Geometry and Trigonometry Revision for A.C. Introduction to Alternating Current. Series Alternating-Current Circuits. Power in Alternating-Current Circuits. Parallel Alternating-Current Circuits. Summary of Equations Derived from Phasor Diagrams. Power Factor Improvement. Balanced Three-Phase A.C. Systems.

Adrian Waygood is a retired lecturer and instructional designer, having had a career in the armed forces, technical institutes and the defence industry in the UK, Canada and the Middle East. These include the Royal Navy, the Royal Navy of Oman, the Northern Alberta and British Columbia Institutes of Technology, the Higher Colleges of Technology (United Arab Emirates) and British Aerospace. He has also managed government trades apprenticeship programmes in Canada, and has consulted on instructional-design methodology at technical-teacher training colleges in India and Indonesia. He holds a Higher National Certificate in Electrical and Electronics Engineering, together with a Master’s Degree in Education Technology.