B-004-05: Triode vacuum tube fundamentals
B-004-05-01:
What is one reason a triode vacuum tube might be used instead of a transistor in a circuit?
It may be able to handle higher power
It uses less current
It is much smaller
It uses lower voltages
B-004-05-02:
Which component can amplify a small signal but must use high voltages?
A vacuum tube
A transistor
An electrolytic capacitor
A multiple-cell battery
B-004-05-03:
A feature common to tubes and transistors is that both:
can amplify signals
have electrons drifting through a vacuum
convert electrical energy to radio waves
use heat to cause electron movement
B-004-05-04:
In a vacuum tube, the electrode that is operated with the highest positive potential is the _________.
plate
filament (heater)
cathode
grid
B-004-05-05:
In a vacuum tube, the electrode that is usually a cylinder of wire mesh is the _______.
grid
filament (heater)
cathode
plate
B-004-05-06:
In a vacuum tube, the element that is furthest away from the plate is the __________.
filament (heater)
grid
emitter
cathode
B-004-05-07:
In a vacuum tube, the electrode that emits electrons is the __________.
cathode
grid
collector
plate
B-004-05-08:
What is inside the envelope of a triode tube?
a vacuum
argon
air
neon
B-004-05-09:
How many grids are there in a triode vacuum tube?
one
two
three
three plus a filament
B-004-05-10:
If you do not wish to have current flowing in the grid circuit of a vacuum tube, the grid should be:
negative with respect to the cathode
positive with respect to the anode
positive with respect to both cathode and anode
positive with respect to the cathode
B-004-05-11:
The negative DC control voltage applied to the control grid of a vacuum tube is called:
bias voltage
suppression voltage
repulsion voltage
excitation voltage
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