This book on Meeting the Energy Challenges has been written to meet the requirements of the degree and honors students of Meerut and all other Indian Universities. The subject matter has been discussed in such a simple way that, the students will find no difficulty to understand it. The proofs of various, theorems and examples have been given with minute details. The book contains a large number of solved examples so that the students may understand the subject easily. The students should follow. The solution very carefully and they should try to reproduce ahem when they do the problems independently. Most of the questions given in the book have been selected from various University examination papers and the book covers the syllabi of almost all the Universities.