iii Preface As a student interested in the rapidly changing and expanding fi eld of electricity and electronics, you will fi nd that Electricity & Electronics provides the fundamentals in easy-to-understand language. Understanding of these principles is ensured through experimentation and demonstration. Experiments with step-by-step instructions are placed throughout the text to help convey the principles of study. Illustrations of the principles covered throughout the text provide prevalent and familiar applications in the fi elds of electricity and electronics. Th ese applica- tions bring the concepts into an everyday focus for the reader. To further connect with the reader, many chapters contain Applied E&E topics relating the electrical prin- ciples of electricity and electronics to state-of-the-art technology. Electricity & Electronics has been carefully crafted to meet industry standards. Th e text is correlated to both ETA International’s Student Electronics Technician (SET) Certifi cation and Precision Exam’s Basic Electronics Certifi cation. Th ese certifi cations will give you a competitive edge over your peers. Th e electricity and electronics industry can be an exciting and fast-paced fi eld. New technologies are constantly emerging and transforming industries. A career in this fi eld will be a commitment to lifelong learning and staying up-to-date with the latest technologies. When you have successfully completed this textbook and your course, you should have a thorough understanding of the concepts of electricity and electronics. You will also have a basis for applying the principles learned to other, more advanced studies in these fi elds. A bright outlook for the electronics industry in the future translates into opportunities for specialized education and a lifetime of challenging and rewarding employment. Th e world of electricity and electronics is a fascinating one, and we are pleased that you have chosen to explore it with us. Howard H. Gerrish William E. Dugger, Jr. Richard M. Roberts About the Author Richard M. Roberts has been teaching, designing curriculum, and supervising teachers for over 35 years. He is an accomplished programmer and computer technician. He has experience as the system administrator for Novell NetWare, Microsoft NT, and IBM token ring networking systems. Mr. Roberts has CompTIA A+, Network+, Security+, and iNet+ certifi cations. He is currently an adjunct instructor at South Florida Community College.