According to Faraday’s Law when magnetic flux changes in the proximity of a coil, is generated a voltage at the terminals of the coil. The magnetic flux changes when the magnet bar moves through the coil. The voltage is indicated by the volt-meter. In fact this is the induced electro- motive- force (EMF).This is a GENERATOR.....When a load(resistance) is connected to the wire, we have an induced current flows through the resistor. In this case a generator is producing electricity and the load is consuming this electricity. http://scratch.mit.edu/projects/13086199/#fullscreen
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 understand how the electricity 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 sine wave? Three Phase Generator Voltage and Current Diagram Why sine wave?