This document discusses synchronous generators or alternators. It provides an overview of the key topics to be covered in a seminar on alternators, including: definitions of single phase and three phase alternators; advantages of alternators such as high voltage generation; synchronous speed and how it relates to frequency and poles; types of stator and rotor construction; common uses of alternators in power generation; and specifications of alternators such as dependence on load power factor. The document serves as an outline for the seminar, highlighting the main sections and concepts to be presented.