cathode voltage drop
DEPRECATED: cathode drop
difference in electric potential due to the space charge near the cathode
Note 1 to entry: The cathode fall is expressed in volt (V).
Note 2 to entry: This entry was numbered 845-07-13 in IEC 60050-845:1987.
Note 3 to entry: This entry was numbered 17-127 in CIE S 017:2011.