Nanotechnology provides highly promising potential for the replacement of conventional energy sources such as fossil and nuclear fuels and Renewable energy sources like geothermal energy, sun, wind, water, tidal or biomass. Breakthroughs in nanotechnology have opened up the possibility of moving beyond our current alternatives for energy supply by introducing technologies that are more efficient, inexpensive, and environmentally clean. Nanotechnology increases the strengths of many materials and devices as well as enhances efficiencies of monitoring devices remediation of environmental pollution and renewable energy system. Nanotechnology provides the potential to enhance energy efficiency across all branches of industry and enhanced renewable energy production through new technological solutions and optimized production technologies. Thus it is necessary for an electrical engineer to study the basics of nanotechnology. This book covers the complete detail of application of nanotechnology in Electrical Engineering. The book uses the plain, lucid and everyday language to explain the subject. The book prepares carefully, the background of each topic giving suitable practical illustrations. Detail explanation of each step given makes it easy for the students to understand the derivations. At the end of each chapter, summary is provided to give the quick review of chapter, which is the feature of this book. The review questions are included at the end of each chapter from practice point of view. The Book deal with the new innovations in Electrical Engineering related with power system. Each chapter is discussed with basics and advanced improvements in energy sector, which is important in understanding the new emerging technology subject such as Nanotechnology. The book explains the application of the nanotechnology in Electrical Engineering. The book will be very helpful not only to the students but also to the subject teachers. The students have to omit nothing and possibly, have to cover nothing more.