The objective of this book is to provide the crux of Electronics Engineering in a concise form to the students to brush up the formulae and important concepts required for IES, GATE, PSUs and other competitive examinations. The Handbook contains all the formulae and important theoretical aspects of ElectronicsEngineering. It will provide much needed revision aid and study guidance before examinations. The specific presentation will help the readers to resurrect the concepts easily. The book covers the syllabus of UPSC Engineering Services exam, GATE and other competitive exams. Special ?Notes? are given in order to emphasize the specific content and helpful to resurrect in short span. Some quick tricks have also been introduced to save time. Any error in printing/calculations/concepts pointed out by the reader will be acknowledged with thanks by MADE EASY.