A fully comprehensive text for courses in electrical principles circuit theory & electrical technology providing 800 worked examples & over 1000 further problems for students to work through at their own pace. This book is ideal for students studying engineering for the first time as part of BTEC National & other pre-degree vocational courses (especially where progression to higher levels of study is likely) as well as Higher Nationals Foundation Degrees & first year undergraduate modules. Now in its fourth edition this best-selling textbook has been updated with developments in key areas such as semiconductors transistors & fuel cells along with brand new material on ABCD parameters & Fouriers Analysis. Greater emphasis is placed on real-world situations in order to ensure the reader can relate the theory to actual engineering practice. 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 & check their progress.