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This book is a most modest attempt to help young students in understanding this fascinating subject in a systematic manner with lucid exposition of its different facets but in a simple language. In the process of writing the book we have consulted many books, papers and cases of various eminent and distinguish writers. Without their literature, the book would not have seen the light of the day. We have tried to acknowledge their contribution wherever possible. Notwithstanding the above, I would like to convey my deep gratitude to each one of them including those whose names do not appear. We have tried to write the book in simple language so that it is interesting to read. Concepts have been explained with the help of flow charts. Most of the chapters have case study at the end and skill development exercises have been given wherever it is desired. Text questions at the end of the chapters have been aimed at assimilation by the reader.

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Malhotra, Rohin
Rohin Malhotra is an engineer graduate in Electrical Engineering discipline in year 2001. He had also completed M.Tech (Power Systems), MBA and Pursuing Ph.d. in Management. I had three years industrial experience and more than ten years teaching experience to my credit. Presently, working as Associate Professor at Asra Institute, Channo since 2013

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