electric discharge can be observed in
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it is observed ingases t
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Electric discharge in gases occurs when electric current flows through a gaseous medium due to ionization of the gas. ... The properties of electric discharges in gases are studied in connection with design of lighting sources and in the design of high voltage electrical equipment.
An ordinary household fluorescent lamp is an example of an electric-discharge source. The lamp tube, coated on the inside with fluorescent phosphors, contains a mixture of a rare gas and mercury vapour. On application of sufficiently high voltage across the lamp's terminals, a low-pressure mercury arc forms.
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