Table of contents: part-i: dc machines magnetic circuits and induction principles of electromechanical energy conversion basic concepts of rotating electrical machines construction of dc machines armature reaction and commutation in dc machines operating characteristics and application of dc generators parallel operation of dc generators operating characteristics and applications of dc motors speed control, starting and braking of dc motors losses, testing and maintenance of dc machines special types of dc machines thyristor control of electric motors objective type questions part-ii: polyphase circuits polyphase circuits objective questions with answers part-iii: ac machines transformers transformers (continued) synchronous generators or alternators rotating magnetic fields synchronous motors parallel operation of alternators construction, theory and operation of polyphase induction motors starting, speed control and braking of polyphase induction motors special induction and polyphas