Atoms are composed of protons, neutrons or electrons.
Electrons orbit around the center or nucleus of the atom.
They become free electrons when they are knocked out of the outer orbit of an atom, creating electric currents if a conductor is present. An electric current is created when a coil of wire moves through a magnetic field. In 1831 Michael Faraday produced an electric current by moving a magnet inside a coil of wire. Thus, Faraday discovered the principle of magneto-electricity. A young Frenchman, Hippolyte Pixii built the worlds first electric generator based on Michael Faraday's principles.