Electricity and electrons
In all electric plants, excluding photovoltaic solar plants, mechanic energy is transformed into electric energy through the same basic procedure. Electric power consists of the tidy movement of electrons, that create electricity as they have a particular physical property: electric charge. In order to activate the electrons, a device called alternator is activated. The alternator consists of electric power conducted by a wrapped conducting wire that rotates inside a magnetic field: the flow variation of the magnetic field inside the wire wrapping generates a force that activates the electrons. In electric plants the magnetic field is generated by powerful electromagnets, i.e. an iron nucleus with another circuit on top of it. The power runs through the circuit, while the conducting wire rotates through turbines, that are moved by the energy of vapour in thermoelectric plants (or by the wind in aeolian plants, water in hydroelectric, etc.).