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THIS BOOK IS THE PROPERTY OF: STATE Book No PROVINCE, Enter information COUNTY- _ in spaces PARISH to the left as SCHOOL DISTRICT, instructed OTHER__ CONDITION Year ISSUEDTO Used ISSUED RETURNED L PUPILS to whom this textbook is issued must not write on any poge or mark any part of it in any way, consumable textbooks excepted. 1. Teachers should see fho» the pupil's name is clearly written in ink in the spaces obove in everybookissued. 2. The following terms should be used in recording the condition of the book: New; Good; Fair: Poor; Bad. -Si9-^<^ YOU SAVEt) JiJ'^'T BasicElectricity Fourth Edition Abraham Marcus and William D/larcui Prentlce-Hall.Inc..EnglewoadCliffs.NewJersey ^ ^ ^ t^ ^-~/ =L m ^ ( ^=1 L ^=s. -=i L * BASICELECTRICITY, Fourth Edition, by Abraham Marcus and WilliamMarcus.PublishedbyPrentice-Hall,Inc.,EnglewoodCliffs. N.J.07632. ©1974byRebeccaB-MarcusandWilliamMarcus. ©1969. 1964, 1958byAbrahamMarcus.Allri^htfireserved. Nopartofthisbook maybereproducedinanyformorbyanymeanswithoutpermission in writingfrom thecopyrightholdersandthepublisher. Printedin the United StatesofAmerica. ISBN0-13-060152-7 10 9 8 7 6 5 4 3 2 1 Prentice-HallInternational. Inc.. London Prentice-HallofAustralia. Pty. Ltd.. Sydney Prentice-HallofCanada, Ltd.. Toronto Prentice-HallofIndia PrivateLtd.. NewDelhi Prentice-HallofJajmn,Inc.. Tokyo About Book This A textbook is a teaching device. As such, it must the third section. The fourth section concerns it- pertain to specific subject matter. This book is a self with the sources of electrical energy — me- text on the fundamentalsofelectricity. A textbook chanical, chemical, etc. Included here are some must be intended for a specific type of student. of the new and, as yet, experimental sources such This book is intended for beginners. It requires as the fuel cell, the solar cell, the atomic cell, and no prerequisite knowledge of physics or mathe- the magneto-hydrodynamic generator. Section V matics other than ordinaryarithmetic. deals with the transmission and control ofelectric And, abo\e all, a textbook must be pedagogi- power. cally sound. Proper organization is all-important. Practical applications of electricity are dis- Wheneveranewconceptispresentedtoastudent, cussedinsection VI.Aseparatechapterisdevoted the gap between this new material and what he toeachtypeofapplication, baseduponthevarious already knows must not be too great. Rather, the effects ofthe electric current, such as the thermal, new ideas must be a continuation and extension luminous, chemical, and magnetic effects. The ofhisknowledge. electric motor, both d-c and a-c types, rates a An ad\'anced student can easily fit a new chapterofitsown. concept into his wide background. But a beginner No book on electricity would be complete has no such background. Unless the new material without mention of electronics. Section VII deals is not too far removed from what he has already with this subject. The electron tube and its semi- learned, he mav find himself unable to bridge conductor counterparts are explained, and their the gap. A book for beginners must present a most common applications — as rectifiers, ampli- — continuous story, proceeding from concept tocon- fiers,andoscillators arediscussed. cept, continually building upon that which has Numerous drawings and photographs are in- gonebefore. cluded in this book. These illustrations are an With this in mind, this book was written. It integral part of this text and must be studied as is divided into seven sections. The first, and intro- such. A set of questions will be found at the end ductory, section deals with the question "What is of each chapter. These questions serve the dual electricity?" Early and present-day theories are purpose of summary and review of the chapter. presented, and in the course of the discussion, the As a summary, the questions offerthe obvious ad- structure of matter, the electric field, magnetism, vantage that the student must first read the text. andstaticelectricityareintroduced. The appendices contain various glossaries ofelec- The second section deals with direct-current trical terms, units, abbreviations, formulas, and phenomena. Alternating current is discussed in graphicsymbols.