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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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Leclanche,_Georges
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1992-09-01
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1839-1882. French engineer. In 1866 he
invented a primary electrical cell, the
Leclanche cell, which is still the basis of
most dry batteries. A Leclanche cell consists
of a carbon rod (the anode) inserted into a
mixture of powdered carbon and manganese
dioxide contained in a porous pot, which sits
in a glass jar containing an electrolyte
(conducting medium) of ammonium chloride
solution, into which a zinc cathode is
inserted. The cell produces a continuous
current, the carbon mixture acting as a
depolarizer; that is, it prevents hydrogen
bubbles from forming on the anode and
increasing resistance. In a dry battery, the
electrolyte is made in the form of a paste
with starch.