 It only took a few weeks for André-Marie Ampère to develop the first formulation of the electromagnetic interaction and present the Ampère's force law, that described the production of mechanical force by the interaction of an electric current and a magnetic field.The first demonstration of the effect with a rotary motion was given by Michael Faraday in 1821.A free-hanging wire was dipped into a pool of mercury, on which a permanent magnet (PM) was placed.