"Electronics is an applied field of physics. It deals with electrical circuits, their components, and their applications. In this course, students study various elements like analog electronics, communications, electromagnetism, digital system design, optoelectronics etc. This book aims to sensitize beginners to the subject. Designed as a lucid text for entry-level students it emphasizes on the theory and applications of the instruments. Keeping this as a background, the author has focused on the fundamental concepts and science involved in electronics"--