Electrical news and engineering . edbody in the neighborhood will attract to itself these nega-tively charger particles. The result then is that we have apassage of electrons from one body through space to theother body. These electrons are charge-carriers; a flow ofelectrons is therefore, a flow of charges, ie., a current of elec-tricity. Hereinafter, unless stated to be otherwise, the wordcurrent refers to this current above described. Consider now, the Tungar bulb, part of the Tungar recti-fier, as illustrated in Fig 1. The hot metal is a tungsten fila-ment, designed and arranged to be heat
Electrical news and engineering . edbody in the neighborhood will attract to itself these nega-tively charger particles. The result then is that we have apassage of electrons from one body through space to theother body. These electrons are charge-carriers; a flow ofelectrons is therefore, a flow of charges, ie., a current of elec-tricity. Hereinafter, unless stated to be otherwise, the wordcurrent refers to this current above described. Consider now, the Tungar bulb, part of the Tungar recti-fier, as illustrated in Fig 1. The hot metal is a tungsten fila-ment, designed and arranged to be heated by the passagethrough it of an electric current from some source, (eitherd. c. or a. c.) the purpose of this current being for heatingonly. Above the filament and close to it, is placed anotherbody, not heated; this, in these bulbs, is a graphite button. The filament is now heated and emits electrons; the gra-phite button is charged positively with regard to the fila-ment. Hence a flow of electrons. 1 negative charge carriers!. Negative Pole. Argon GasGraphite AnodeTungsten Cathode ositive Pole. Fig. 1—The Tungar Bulb takes place from the filament to the graphite and around through the circuit outside connecting these electrodes Electrical engiai 1 1 certain system of .1^1, Foi the direction of flow of current and. according to these, .1 1 inrent flowing in .1 given direction is t be a positivecurrent I lie opposite direction of flow is called nega \ow. in the tube we have .1 negative current flowing from?11 to graphite bloi k \ 1 tional terms vvi -m; thi condition 1 ive current 1! from graphite block to filament inside the bulb. w e ci insider the 1 ui n n THE ELECTRICAL NEWS May 1, 1919 of the bulb, (negative pole) to the graphite (anode) andacross the gap to the filament, (cathode) then out by thebase, (positive pole) and around the circuit, and in again atthe negative pole. The graphite is comparatively cold; it does not emit anyelectrons, even if the polarity of
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