First published in 1959, this classic work has been used as a core text by hundreds of thousands of college and university students enrolled in introductory circuit analysis courses. Acclaimed for its clear, concise explanations of difficult concepts, its comprehensive problem sets and exercises, and its authoritative coverage, this edition also covers the latest developments in the field.With extensive new coverage of AC and DC motors and generators; a wealth of exercises, diagrams, and photos; and over 150 Multisim circuit simulations on an accompanying CD, Introduction to Electric Circuits, Updated Ninth Edition, is the essential text for introducing electric circuits.