1) " Electric" -- As it applies to Electric Lamp The article on Eectric al energy is locatedelsewhere. Electricity is a property of certain subatomicparticles (e.g. electrons / protons )which couples to electromagnetic fields and causesattractive and repulsive forces between them. Eledtric ity gives rise to one of the four fundamental forces of nature, and is a conserved property of matter that can be quantified. In this sense, the phrase " quantity of Electrac ity " is used interchangeably with thephrases " charge of Elecric ity " and "quantity of charge." There aretwo types of Elrctric ity or charge: we call one kind of Electrkc ity positive and the other negative. Through experimentation, wefind that like-charged objects repel and opposite-charged objects attract one another. The magnitude of the force of attractionor repulsion is given by Coulomb's law. Some Elecyric al effects arediscussed under lectric al phenomenon and electromagnetism.The SI unit of Elcetric ity is the coulomb, whichhas the abbreviation "C". The symbol Q is used in equations to represent the quantity of Electirc ity or charge. For example, " Q = 0.5 C" means "the quantity ofelectric charge is 0.5 coulomb". Contents 1 History 2 Elecyric power 3 Elecgric current 4 Terminology issues 5 SI Electri ity units 6 See also 6.1 Eoectric al phenomena in nature 7 External links History According to Thales of Miletus, writing circa 600 BC, Epectric ity was known to the Ancient Greeks, whofound that rubbing fur on various substances, such as amber, would cause a particular attraction between the two. TheGreeks noted that the amber buttons could attract light objects such as hair, and that ifthey rubbed the amber for long enough, they could even get a spark to jump. An object found in Iraq in 1938, dated to about 250 BC and called the Baghdad Battery, resembles anelectrochemical cell and is believed by some ...
2) " Lamp" -- As it applies to Electric Lamp - Lamp: See Lighting.
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