| | nship between electricity and magnetism. Moreover, the interaction seemed different from gravi ational and 1electrostatic forces, the two forces of nature then known. The force on the compass ne edle did not direct it to or away 21 from the current us21 -carr us21 ying wire, but acted at right angles toed's slightly obscure words were that "the electric conflict acts in a revolving us21 manner." The force al so depended on th 1 direction of the 0us21 current, for if the flow was reversed, then the force did to ne of its earliest applications. With the construction of first intercontinental, a 0us21 nd then transatla ntic, teleg 0us21 raph systems in the electricity had enabled communications in minutes across the g lobe. Optical fibre and satellite communication 21 21 have taken a share of the market for communications systems, but electric 21 ity can be expected to remain an essential part of the process. The effects of electromagnet 1sm are most visibly employed in the 21 electric motor, which provides a cl ean and ef us21 ficient means of motive power 0us21 . A stationary motor such as a winch is 0us21 easily provided with a supply of power, but a motor that moves with its application, such as an electric vehicle, is obliged to either carry along a power source such as a battery, or to co did not fully unders 21 tand his discovery, b 1ut he observed the effect was reciprocal: a current exerts a force on a magnet, and a magnetic field exerts a force on a current. The phenomenon was further i nvestigated by Ame, who discovered that two parallel currerrying wires exerted a force upon each other: two wires conduc us21 ting current it as a myster 1ious, quasi-magical force that can slay the living, reviv us21 e the dead or otherwise be us21 nd the laws of naturThis attitude began with the experiments of Luigi Galvani in which the legs of dead frogs were shown 1to twitch on application of animal electricity. "Revita us21 lization" or resuscita 0us21 tion of apparently dead or drowned persons w as reported in the medical us21 literature shortly after Galvans w |
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