The module 2 of book is about Faraday's law.We learned from Michael Faraday the electromagnetic induction theory. In other words make it easy to be understood by electricians, the circular motion of the coil into magnetic field will generate a voltage at the terminals of the coil and this voltage is direct proportional with the ratio of how fast the magnetic flux changes in time.There are ways to generate VOLTAGE for a coil of wire (EMF-electro- motive- force). Conductive materials include a large amount of negative and positive charged particles. If there is no motion will be no EMF During my working life-time as electrical contractor and engineer I found that most of the electricians I meet will find hard to explain how the electricity is generated. Well established companies do not pay too much attention to the electricians training.IBEW is doing something but not enough.The point is : you need to be a self starter in order to achieve skills to protect yourself and others and be financially well.There is no blame in this is just my intention help them a bit. I know how hard is to support a family, to bring food and things to our loves one since working hard.It remains no time to review and to make theoretical practice in order to understand everything we do......unless we care about us !You have the option to achieve all modules from 1 to 20 or to choose the ones important for you in order to understan how the electricty is generated. I will encourage you to achieve the complete package and read them step by step as indicated below. Highlighted item is the one you just achieved Lorenz Force Faraday’s Law Permanent magnet and the electromotive force(EMF) Moving a coil into a magnetic field The Magnetic Flux Magnetic Flux & Surfaces Magnetic Flux and Voltage Magnetic flux variation How the Electromotive Force will appear Magnetic field intensity (B) Wire polarization with electric charges EMF formula: U=V*B*L*sin ? Rotating a coil in magnetic field The experiment of electricity production Single Phase Generator Voltage and Current Diagram Why sin wave? Three Phase Generator Voltage and Current Diagram Why sin wave?