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เนื้อหาย่อ : Continuous expansion in the fron- tiers of electrical and electronic knowl- edge has prompted this fifth edition of Fundamentals of Electricity. Every ef- fort has been made to explain new applications of familiar principles, with a minimum of mathematics, in a lan- guage that the average reader can under- stand. Today there are few electrical fields where electronic devices are not also used. All the material presented in this book is basic to specialized electri- cal fields as well as many related fields. This complete revision follows the previous pattern of enlarging the scope by the addition of new and updated ma- terial. The last two chapters have each been divided to reflect the expanded knowledge and application of electronics in all phases of modern communication systems. In these new chapters the author has brought the modern advances in solid state devices and electronic com- puters within the grasp of every reader. The new format has several outstand- ing features: color has been used func- tionally throughout; dual-columns allow proximity of textual material to the illustrative diagrams; topics have been reorganized with the view of maximiz- ing flexibility in presenting the material to a variety of instructional programs. The increased number of updated re- view questions will assist the reader in summarizing his knowledge of each chapter. All of these features serve to stimulate the learning process by assist- ing the reader to assimilate the material quicker and retain it longer. The fifth edition of Fundamentals of Electricity is the culmination of the efforts of many outstanding pioneers in the science of electricity and electronics. Among the most notable authors who collaborated to make this book a success are Wynne L. McDougal, Richard R. Ranson, and Carl H. Dunlap. We grate- fully acknowledge the contributions of these men.