Electricity 1 devices circuits and materials 7th edition introduces readers to basic electron theory and electron movement as well as direct current series circuits parallel circuits and series parallel circuits numerous circuit diagrams appear throughout the book along with photographs of electrical devices and materials. Electricity 1 helps the student achieve a basic understanding of electrical theory and its application to devices circuits and materials the knowledge obtained by a study of this text permits the student to progress to further study the development and the study of the subject of electricity are continuing processes. Electricity 1 devices circuits and materials 9th edition follows the same user friendly approach that made previous editions so effective while incorporating updates based on the 2008 national electrical code. Electricity 1 devices circuits and materials tenth edition maintains the user friendly style and proven approach that are so effective all while incorporating new material and updates based on the 2011 national electrical coder