Explore the principles of generators and motors in this comprehensive physics lesson. Discover how generators convert mechanical work into electrical energy through a rotating coil in a magnetic field, and learn the formula for generator emf. Understand the sinusoidal nature of generator output and its relation to alternating current. Delve into the workings of motors as reverse generators, converting electrical energy to mechanical work. Examine the concept of back emf in motors and its significance according to Lenz's law. Gain insights into the interconnected principles of electromagnetism and mechanical energy conversion through clear explanations and derivations.