This book is written to aid the striker for Electrician's Mate 3 to qualify for advancement to that rate. Electrical currents and circuits-Ohm's Law 1 Magnetism 31 Electromagnetism and magnetic circuits 50 Induction 68 Alternating- and direct-current generators 89 Direct-current generators 103 Types of direct-current generators 115 Operation of direct-current generators 141 Direct-current motors 156 Maintenance of direct-current motors and generators...