5.
The three elements of a triode electron tube are
a.
plate, cathode, and screen grid.
b.
control grid, cathode, and plate.
c.
cathode, control grid, and screen grid.
d.
screen grid, control grid, and plate.
6.
Where is bias voltage applied to an electron tube?
a.
To the cathode
b.
To the screen grid
c.
Between the control grid and the plate
d.
Between the cathode and the control grid
7.
The purpose of operating a screen grid at or near plate potential is to
a.
decrease screen grid current.
b.
repel the secondary electrons back to the plate.
c.
accelerate the movement of electrons to the plate.
d.
give the screen grid absolute control over plate current.
8.
In addition to the cathode and plate, the elements of a tetrode tube are
the
a.
control grid and suppressor grid.
b.
control grid and screen grid.
c.
screen grid and repeller grid.
d.
repeller grid and suppressor grid.
9.
The suppressor grid reduces the internal capacitance of the tube and
permits
a.
operation at lower frequencies.
b.
operation at higher frequencies.
c.
more plate current and screen grid current.
d.
more screen grid current and less plate current.
10. The accelerating element in a pentode electron tube is the
309 L1
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