This new edition is brought fully up to date with developments in key areas such as semiconductors, transistors, and fuel cells, with brand new material on ABCD parameters and Fourier's Analysis. An increased focus on real-world situations by way of illustrative example maximises relevance to actual engineering practice for the student reader. The "Extensive Solutions Manual" is now available on line (600 pages). This book offers a fully comprehensive text for courses in electrical principles, circuit theory, and electrical technology, providing 800 worked examples and over 1000 further problems for students to work through at their own pace. The coverage takes students from the fundamentals of the subject, up to and including first degree level, making this book ideal for students studying engineering for the first time as part of BTEC National and other pre-degree vocational courses (especially where progression to higher levels of study is likely), as well as Higher Nationals, Foundation Degrees and first year undergraduate modules.; This third edition has been updated with developments in key areas such as semiconductors, transistors and fuel cells, along with brand new material on ABCD parameters and Fourier's Analysis. In addition, the text has been restructured throughout so that 175 Exercises now appear at regular intervals, which the student can work through to test their learning of essential concepts and check their progress.