F.A.Q.#16.

How is electricity produced in a circuit?...  There are atoms in the air, these atoms contain electrons. To produce electricity you need a force to move these electrons. There are several ways to produce this force, the most common being magnetism which can be produced by generators. This force is called E.M.F. (ElectroMotive Force) . As conductors are passed through a magnetic field a voltage (emf) will be produced in each conductor. This voltage will produce the necessary pressure to move the electrons. The movement of these electrons is called electric current or amperage. Thus you have voltage and amperage which along with resistance (the load) make up an electric circuit.
Electricity is one of the great assets we have. Just think for a minute how you feel when your power goes off for a short period of time. Harnessing electricity has improved just about everything in our lives. Electricity begins mostly at large dams and waterfalls, and some nuclear plants. The constant flow of water is used to turn large generators, which through magnetism produces electricity. The electricity is than sent to power lines at extremely high voltages. When it reaches your home from sub stations, it goes through a step down transformer, ( these are the large metal units you see on the telephone pole ) and produces the correct voltage needed for your home.

Q....Reference  FAQ #16.  What does it matter if the air has atoms with electrons unless you are interested in an insulator. It is the atoms in the conductor that have an odd number of electrons in the outer shell of the atom which allows the voltage (pressure) to move electrons from atom to atom. The air has an even number of electrons in the outer shell and is a fair insulator.
A...This website is not interested at this time to get into the entire theory of how electrons are derived from atoms. This can be obtained from many areas on the web. We are only interested in the very basics so that everyone can understand without being bored. Thank you for your input.