It can be said that in the proper connection between electricity and magnetism, there was also the English Michael Faraday. He valued experience as evidence of natural phenomena. It was thanks to his experiences and his curiosity, he was able to demonstrate in 1822 the circular magnetic field. In this way, the relationship between magnetism and electricity was established m355 baldor. The French physicist André-Marie Ampere, after knowing the experiments of the Dane, began to create a law of electromagnetism, understanding that the lines of force created by the electrified wire, the magnetic field, are circular, that is, they form an invisible cylinder around of the driver.
Thus, by a simple experiment, in the year 1820, the Danish scientist Hans Christian Oersted discovered a physical principle of extreme relevance for the proper operation of the electric motor. The scientist passed an electric current, generated by a normal heap, by a conductive wire and soon after it approached a compass of that wire. The needle, which acts magnetically, moved and aligned perpendicular to the thread. For Oersted, the event confirmed that around the wire, had a magnetic field, which acted on the field of the needle. Until now, it was thought that the magnetic field moved only in a straight line, as from one magnet to another.