There no any doubt that, the science of electric machinery is one of the necessary important sciences for the undergraduate students in electrical engineering and in mechanical engineering as well. This book "Transformers & Electric Machinery" covers transformers and essential electric machines.It has been written to meet the introductory phase of the needs of those students and engineers who are interested in electrical machinery science and its applications. The essential goal from this book is offering simple and concentrated scientific material about transformers and essential electrical rotating machines equipped with enough applied examples, tutorial problems and different review answered questions for revision for those students and engineers who are interested with electrical machinery science.