In the present edition the entire text has re-written in a lucid manner without altering the basic structure and retaining the salinet feature of earlier editions illustrative examples and exercise given at the end of every section or sub sections in each chapter have been arranged in the increasing order of difficulty level and have been categorised in the following category basics based on basic concepts and formulas at the end of each chapter exercising consisting of fill in the blanks type question and very short answer type question have been given.
