4.
To operate properly, a triode requires three different supply
voltages: an A-supply, a B-supply, and a C-supply. The functions of
the A-, B-, and C-voltages are to supply, respectively, the
a.
filament, grid, and plate voltages.
b.
plate, grid, and filament voltages.
c.
grid, filament, and plate voltages.
d.
filament, plate, and grid voltages.
5.
The basic triode amplifier circuit shown in figure 50 (TM 11-
662) can be divided into three basic systems: the input circuit, the
cathode circuit, and the output circuit. The output circuit includes
circuit elements between the
a.
plate and ground.
b.
grid and cathode.
c.
grid and ground.
d.
plate and grid.
6.
The control grid in a triode tube normally governs the flow of
plate current by
a.
preventing a space charge from being established.
b.
changing the distance between the wires of the helix.
c.
producing an electrostatic field which controls the effect of
the plate's electrostatic field.
d.
attracting a definite portion of the emitted electrons to
control the number of electrons reaching the plate.
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