4.
Electron flow in a diode tube is best described as the flow of
electrons from the
a.
plate to the cathode when the cathode is positive in respect
to the plate.
b.
plate to the cathode when the plate is positive in respect to
the cathode.
c.
cathode to the plate when the plate is positive in respect to
the cathode.
d.
cathode to the plate when the cathode is positive in respect
to the plate.
5.
What are the four important factors that control a diode's plate
current?
a.
Cathode temperature, emission rate, space charge, and plate
potential relative to the cathode.
b.
Emission rate, magnetic field intensity, electrostatic field
intensity, and cathode material.
c.
Space charge, emission velocity, plate potential relative to
the cathode, and filament type.
d.
Filament type, cathode temperature, electrostatic
field
strength, and electromagnetic field strength.
6.
Assume that the emission of electrons is in the direction shown
in B of figure 22 (TM 11-662). When does emission saturation occur?
a.
When all the electrons in the space charge are attracted to
the plate.
b.
When an increase in cathode temperature fails to increase
electron emission.
c.
When the space charge becomes so dense that electron flow to
the plate is cut off.
d.
When an electron is supplied back to the cathode from the
space charge for each electron emitted by the cathode.
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