A voltaic pile is a set of individual Galvanic cells placed in series. The voltaic pile, invented by Alessandro Volta in 1800, was the first electric battery. Building on Galvani's 1780s discovery of how a circuit of two metals and a frog's leg can cause the frog's leg to respond, Volta demonstrated in 1794 that when two metals and brine-soaked cloth or cardboard are arranged in a circuit they produce an electric current. In 1800, Volta stacked several pairs of alternating copper (or silver) and zinc discs (electrodes) separated by cloth or cardboard soaked in brine (electrolyte) to increase the electrolyte conductivity. When the top and bottom contacts were connected by a wire, an electric current flowed through the voltaic pile and the connecting wire.
Other articles related to "voltaic pile, voltaic, pile":
... Davy in 1806, employing a voltaic pile of approximately 250 cells, or couples, decomposed potash and soda, showing that these substances were respectively the oxides of potassium and sodium, which ... Employing a battery of 2,000 elements of a voltaic pile Humphry Davy in 1809 gave the first public demonstration of the electric arc light, using for the purpose charcoal enclosed in a vacuum ... was not until many years after the discovery of the voltaic pile that the sameness of annual and frictional electricity with voltaic electricity was clearly recognized and demonstrated ...
... The strength of the pile is expressed in terms of its electromotive force, or emf, given in volts ... that the emf, which drives the electric current through a circuit containing a voltaic cell, occurs at the contact between the two metals ... The emf between the ends of the pile is the number of cells multiplied by the difference of the standard electrode potential for each of the two half reactions ...
1800, Volta invented the first true battery, which came to be known as the voltaic pile ... The voltaic pile consisted of pairs of copper and zinc discs piled on top of each other, separated by a layer of cloth or cardboard soaked in brine (i.e ... Unlike the Leyden jar, the voltaic pile produced a continuous and stable current, and lost little charge over time when not in use, though his early models could not produce a voltage strong enough to ...
Famous quotes containing the word pile:
“Oh, to have a little house!
To own the hearth and stool and all!
The heaped-up sods upon the fire,
The pile of turf against the wall!”
—Padraic Colum (18811972)