arc-back

[ ahrk-bak ]
/ ˈɑrkˌbæk /

noun Electronics.

an undesirable phenomenon, occurring in rectifier tubes, in which current flows in the reverse direction, from anode to cathode, as a result of arcing, limiting the usable voltage of the tube.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019