The Discovery of Electricity Timeline.

The Discovery of Electricity:

Schematic diagram of a copper–zinc voltaic pile.

v	Democritus (460?–370? BC) proposes an “atomic theory” wherein all matter is made up of indivisible particles, or atoms.
v	Charles de Coulomb (1736–1806) discovers that the force of attraction between electric charges is proportional to the product of the two charges and inversely proportional to the distance between them.
v	Luigi Galvani (1737–1798) discovers that two unlike metals immersed in blood cause the muscles of a frog’s legs to twitch.
v	Alessandro Volta (1745–1827) discovers that a current flows between two connected unlike metals in a salt solution and, thus, invents the battery.
v	John Dalton (1766–1844) proposes the first table of atomic weights of elements.
v	André Ampere (1775–1836) develops the theory of magnetic lines of force and quantifies electric current for the first time.
v	Hans Christian Ørsted (1777–1851) discovers a connection between electric current and magnetism and a way to measure electric current by the deflection of a magnet.
v	Georg Ohm (1787–1854) discovers the relationship (Ohm’s Law) between voltage, current, and resistance in a circuit.
v	Michael Faraday (1791–1867) analyzes the chemical reactions in batteries and defines the terms “electrode,” “anode,” “cathode,” and “electrolyte.”
v	James Clerk Maxwell (1831–1879) develops the mathematical equations relating electricity and magnetism.
v	Joseph Thomson (1856–1940) proves that electricity consists of electrons.

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