This book has been prepared strictly in accordance with the Third Semester-EEE syllabus of University of Kerala and also useful for B.Tech. S1 S2 students of all other branches of Calicut M.G. and Kannur Universities. The subject matter is divided into three chapters. Efforts have been made to make the treatment simple lucid and rather comprehensive Great care has been taken in explaining points in a manner that the students wouldnt find any difficulty for following the same. Necessary diagrams