Oersted in the experiment showed that there is an electric current carrying wire around the magnetic field. Based on the Oersted experiment, the "electrical current can generate magnetic fields". But the field got magentik cause electric currents? Two people can demonstrate the opposite effect of the Oersted experiment of England Michael Faraday and Joseph Henry of the United States. Both succeeded in proving that the changes magentik field in the coil can generate
a potential difference across the ends of the coil is called electromotive force induksi.Jika ends of the coil is covered with a load, an electric current will flow through the load. Influence the onset of induced emf due to changes in electrical current or magnetic field is called electromagnetic induction.Due to the discovery of electromagnetic induction was made two ayitu tool: an electric generator and transformer. Electric generator can produce a large power electric current at a low price. While a transformer can change the electrical voltage alternating-balikmenjadi higher or lower, thus more electricity efficient.
