This volume has been designed to cover the A1 and A2 stages of the Higher National Certificate in Electrical and Electronic Engineering. The contents correspond with much of the work in the Department of Education and Science outline syllabuses for HNC courses in England and Scotland and the text should also be useful for undergraduate CEI Part 1 and HND courses. This second edition has been updated to include recent developments in machinery and electronics. An introduction to the generalized theory of machines has been given and treatments of synchronous and induction machines have been substantially revised. A large number of worked examples have been included in the text. Problems with answers at the end of each chapter, some from previous examination papers, will give readers the opportunity to periodically test their understanding of the subject.