: a movement of positive or negative electric particles (such as electrons) accompanied by such observable effects as the production of heat, of a magnetic field, or of chemical transformations compare alternating current, direct current, displacement current ...
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Everyday modern life is pervaded by electromagnetic phenomena. When alightbulbis switched on, a current flows through a thin filament in the bulb, and the current heats the filament to such a hightemperaturethat it glows,illuminatingits surroundings. Electric clocks and connections link simple device...
The efficiency of linear motors is somewhat less than that of rotating motors because of end effects. Its “rotor” must be magnetized as it comes under the “stator.” This reduces the effectiveness of the first one or two pole spans. The input current is also relatively high because the ...