RAJENDRA PRASAD, Ph.D. (IIT Delhi), is former Professor and Head, Department of Electrical Engineering, National Institute of Technology (NIT), Patna. He is presently visiting faculty in NIT, Patna and has to his credit a number of publications in national and international journals and conferences. Besides teaching experience of more than forty six years at both undergraduate and postgraduate levels, Prof. Prasad has also authored five books. His fields of specialisation are instrumentation, estimation and control, electrical engineering, and electrical machines.