- an electric battery for supplying a constant, positive voltage to the plate of a vacuum tube.
Origin of B battery
First recorded in 1920–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for b battery
The negative terminal of the B-battery is connected to the filament.
Now, suppose that the B-battery takes away 100 of these each second.
Of course, as long as the switch in the B-battery is open no current can flow.
This new battery we shall call the “plate battery” or the “B-battery.”
Suppose that we take the same tube and use a B-battery of lower voltage.