In twenty chapters, the book deals with semi conductors and devices, rectifiers, voltage regulations, switching devices, bjt, jfet, mosfet, op amps, triac, diac, ujt, digital circuits, scr, solar cells, photo transistor, cro television, ionosphere, reader, lasers, holography, optical fibres, computers, quantum dots, spinotrics, mems, etc. The book includes several solved examples throughout the text to illustrate the concepts and applications and help in an easier understanding of the subject. Review questions and problems have been included for easy understanding of the subject. Objective type questions, short question answers, true/false and fill in blank questions throughout the text will be highly useful to all and those preparing for various competitive entrance examinations. - from Amzon