" and "cold cathode" versions. the former is the conventional fluorescent tube for offices and factories; "hot cathode" relates to the starting of the lamp by pre-heating the electrodes to create sufficient ionization of the gas and mercury vapour to establish the discharge. cold cathode lamps are mainly...
, in which the electronic action occurred in a gaseous state . a semiconductor device works by controlling an electric current consisting of electrons or holes moving within a solid crystalline piece of semiconducting material such as silicon , while the thermionic vacuum tubes it replaced worked by...
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