![]() ![]() Ancient Egyptian texts dating from 2750 BCE referred to these fish as the "Thunderer of the Nile", and described them as the "protectors" of all other fish. Long before any knowledge of electricity existed, people were aware of shocks from electric fish. History Thales, the earliest known researcher into electricity Electrical power is now the backbone of modern industrial society. Electricity's extraordinary versatility means it can be put to an almost limitless set of applications which include transport, heating, lighting, communications, and computation. The rapid expansion in electrical technology at this time transformed industry and society, becoming a driving force for the Second Industrial Revolution. The theory of electromagnetism was developed in the 19th century, and by the end of that century electricity was being put to industrial and residential use by electrical engineers. Electronics which deals with electrical circuits that involve active electrical components such as vacuum tubes, transistors, diodes and integrated circuits, and associated passive interconnection technologies.Įlectrical phenomena have been studied since antiquity, though progress in theoretical understanding remained slow until the 17th and 18th centuries.Electric power where electric current is used to energise equipment. ![]() Electric potential is typically measured in volts.Įlectricity is at the heart of many modern technologies, being used for: In most applications, a force acts on a charge with a magnitude given by Coulomb's law. The movement of electric charges is an electric current and produces a magnetic field. ![]() The presence of either a positive or negative electric charge produces an electric field. Various common phenomena are related to electricity, including lightning, static electricity, electric heating, electric discharges and many others. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations. ![]() Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. ![]()
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