The book has been written in a simple and comprehensible language. • A large number of illustrations, pictures and interesting examples have been provided to make the reading interesting and engaging. • The important laws, concepts and principles have been highlighted for a more focussed learning. • A large number of solved examples which have appeared in the examination papers of various universities have been given in each chapter for the benefit of students. • The questions that have been provided in the Exercises are in tune with the latest pattern of examination.