Table Of ContentACING THE GATE
WILEY
ELECTRICAL ENGINEERING
ACING THE GATE
WILEY
ELECTRICAL ENGINEERING
Dr. Debashis Chatterjee
Professor
Department of Electrical Engineering
Jadavpur University
Kolkata
Dr. J. S. Lather
Professor
Department of Electrical Engineering
National Institute of Technology
Kurukshetra
Dr. Lalita Gupta
Assistant Professor
Maulana Azad National Institute of Technology
Bhopal
ACING THE GATE
WILEY
ELECTRICAL ENGINEERING
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ISBN: 978-81-265-5087-6
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PREFACE
Wiley’s Acing the GATE Examination in Electrical Engineering is intended to be the complete book for
those aspiring to compete in the Graduate Aptitude Test in Engineering (GATE) in Electrical Engineering discipline.
It comprehensively covers all the topics as prescribed in the GATE 2016 syllabus in terms of study material, quick
reference material and an extensive question bank, complete with solutions. The book offers a number of useful features
and the approach is logical concept building rather than only formula based, as offered by the other books generally
published in this domain.
The objective has been to structure this book as a complete reference covering fundamental aspects of theory before
proceeding to relevant questions. A three tier approach has been adopted to create this manuscript, that is, coverage of
the basic building blocks for each of the subjects followed by the exhaustive solved examples, and then practice exercises
with one and two marks questions. Lastly the set of questions from GATE previous years’ papers starting 2003 to cur-
rent have been provided along with their solutions and explanations as a supplement to the formal subject coverage.
The book presumes basic understanding of the fundamentals of Electrical Engineering and related basic electronics.
The book is divided into 10 chapters based on the units of the syllabus, wherein each chapter constitutes a subject. The
chapters are divided into various sections which are self-sufficient and easy to read and understand. The sequence of the
chapters has been arranged in such a way that almost no cross-referencing to subsequent chapter is needed. The system-
atic coverage of the book by the aspirant enhances their knowledge with valuable insights into problem solving approach.
The authors are of the view that the systematic coverage of this text will not only enhance the GATE cracking skills
but also impart a level of knowledge to the students which might have been missed by them during formal study of
the subjects in the classroom. In addition, the subject centric approach of the books trains the reader to crack other
parallel examinations like UPSC Exams etc.
Though adequate precautions have been taken to ensure correctness of theoretical concepts, equations and related
questions, we appreciate communication regarding any inadvertent mistakes that you might come across during the
course of your study.
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vi PREFACE
Last but not the least, the authors wish to convey thanks to the entire editorial and production team for being
patient to wait for the completion of manuscript by the authors and understanding the technicalities involved in the
writing such a comprehensive book and finally for all their efforts to make this dream a reality. The continuous inputs
from the editorial team of Wiley India and systematic coverage and compilation by the authors, have resulted into this
cohesive and complete reference text for GATE examination in Electrical Engineering.
D. Chatterjee, J. S. Lather and Lalita Gupta
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ABOUT THE AUTHORS
Dr. Debashis Chatterjee is Professor at the Department of Electrical Engineering, Jadavpur University, Kolkata.
He received his B.E. in Electrical Engineering from Jadavpur University, Kolkata, M. Tech in Machine Drives and
Power Electronics from IIT-Kharagpur and Ph.D. from Jadavpur University, Kolkata. Dr. Chatterjee is the author
and co-author of more than 60 journal articles and conference papers in reputed publications. His areas of interest are
Parameter Estimation and Speed Control of Induction Machines, Control of Induction Generators, Development of
Improved Harmonic Elimination Techniques of Inverters, Control of Permanent Magnet Machines.
Dr. J. S. Lather is Professor at the Department of Electrical Engineering, National Institute of Technology, Kurukshetra.
He received his B.E. in Electrical Engineering from SVNIT, Surat, M. Tech in Control Systems from NIT, Kurukshetra
and Ph.D. in the area of Robust Control from NIT, Kurukshetra. Dr. Lather has more than 21 years of teaching, research
and industrial experience to his credit. He has published more than 40 research papers in national and international
journals and in conferences proceedings. His areas of specialisation are Control Systems, Power Systems and Semantic
Computing.
Dr. Lalita Gupta is Assistant Professor at the Department of Electronics and Communication Engineering, Maulana
Azad National Institute of Technology, Bhopal. She received her B.E. in Electronics and Telecommunication from
Pt. Ravi Shankar Shukla University Raipur, M. Tech in Digital Communication from Maulana Azad National Institute
of Technology, Bhopal and Ph.D. from the same institute. Since July 2004 she has been associated as a faculty member
with the Maulana Azad National Institute of Technology, Bhopal. She is a member of IEEE, IETE, ICEIT, IE.
Dr. Gupta has 35 research publications in national and international journals of repute. Her area of specialisation is
Signal Processing.
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ACING THE GATE
ABOUT GATE EXAMINATION
The Graduate Admission Test in Engineering (GATE) is an All-India level competitive examination for engineering
graduates interested in pursuing Masters or Ph.D. programmes in India The examination tests the examinees in
General Aptitude, Engineering Mathematics and the discipline (subject) of study in the undergraduate course. The
objective of GATE is to identify meritorious and motivated candidates for higher studies in Engineering and Sciences.
The examination serves as a benchmark for normalisation of the undergraduate engineering education in the country.
The level of competitiveness can be gauged from the fact that close to ten lakh students appear in this competitive
examination every year.
Admission to Higher Learning Courses
A valid GATE score is essential to become eligible for admission to the post-graduate courses in Engineering, that is,
M.Tech, M.E. or direct doctoral programme in the Indian higher education institutes. Although qualifying the GATE
examination entitles you to apply for the higher degrees; achieving qualifying score is definitely not enough if one is
aspiring for admission to top institutes like the IITs, the NITs, the Indian Institute of Science (IISc) and some of the
high ranked universities. For this, a high GATE score is important. Needless to say, a percentile of greater than 95 is
perhaps the least one needs to secure admission to a top institute. A total of 804463 candidates appeared for GATE
2015 out of which about 125851 students belonged to Electrical branch of engineering. It is important to mention here
that only 15.05% of those who appeared could qualify according to the qualifying marks set by the GATE examination
committee.
Financial Assistance
Selected GATE qualified candidates admitted to M.Tech programmes in Colleges/Universities all over India are
eligible for obtaining financial assistance. The financial assistance is awarded to Indian nationals doing the M.Tech
programmes, subject to institute rules. It is also available in the form of Half-Time Teaching Assistantship (HTTA)
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