Lecture 19 - Unidirectional generator + motor - 3rd sec

In this lecture, you will study the Alternating current generator "Dynamo" (usage, scientific idea, its cases, structure, and How it works)
 and the average induced emf in a coil, the effective value of the alternating current, and finally the eddy current.

this is in chapter 3 (ُElectromagnetic Induction) Egyptian curriculum for 3rd secondary students (thanwya)