The thermionic vacuum tube and its applications (1920)
Van der Bijl, Hendrik Johannes, 1887- · New York McGraw-Hill Book, Co · leaf 85
s characteristic is shown in Fig. 20. The part OAB representsthe cm-rent that is Umited only by the space charge of the electrons 62 THERMIONIC VACUUM TUBE in the space between cathode and anode. At B the apphed voltagebecomes large enough to pull all the electrons to the anode as fastas they are… … Fig. 21. pah of quadrants of an electrometer. If the cathode be raisedto a high temperature, the anode would acquire a negative chargewhich can be measured with the electrometer. Obviously in thiscase the potential at all points between cathode and anode mustbe negative and the potential…
Telegraph, Wireless
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