ELECTRICITY 2 DEVICES, CIRCUITS, AND MATERIALS

Abstract

The ninth edition of ELECTRICITY 2 has been updated to reflect current materials and techniques in electrical applications, while maintaining the features that have made the text so popular through previous editions. Summary statements are found at the end of each unit, and several new problems have been included in the Achievement Review sections. ELECTRICITY 2 helps the student achieve a basic understanding of the characteristics of alternating-current circuits and the devices contained in the circuits. The knowledge obtained by a study of this text permits the student to progress to further study. It should be realized that both the development of the subject of electricity and the study of the subject are continuing processes. The electrical industry constantly introduces new and improved devices and materials, which in turn often lead to changes in installation techniques. Electrical codes undergo periodic revisions to upgrade safety and quality in electrical installations. The text is easy to read and the topics are presented in a logical sequence. The problems provided in the text require the use of simple algebra and simple trigonometry for their solutions. The student is advised that electron movement (from negative to positive) is used in this text to define current direction. Each unit begins with objectives to alert students to the learning that is expected as a result of studying the unit. An Achievement Review at the end of each unit tests student understanding to determine if the objectives have been met. Following selected groups of units (Units 1–9 and 11–15), a Summary Review unit contains additional questions and problems to test student comprehension of a block of information. This combination of reviews is essential to the learning process required by this text. All students of electricity will find this text useful, especially those in electrical apprenticeship programs, trade and technical schools, and various occupational programs. The most recent edition of the National Electrical Code® (published by the National Fire Protection Association [NFPA]) should be available for reference as the student uses ELECTRICITY 2. Applicable state and local regulations should also be consulted when executing actual installations. Features of the ninth edition include • Summary statements in all units • Up-to-date content reflecting current methods and materials of the trade • Currency with the most recent edition of the National Electrical Code® • Detailed problem solutions in most units • Achievement Reviews that reinforce concepts • Practical problems to test student learning • Numerous new problems for student practice Instructor’s Guides for ELECTRICITY 1 through ELECTRICITY 4 are available. The guides include the answers to the Achievement Reviews and Summary Reviews for each text and additional test questions covering the content of each text. Instructors can use these questions to devise tests to evaluate student learning.