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CIE-1 Quiz 6


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1: The original invention of the vacuum tube diode
was patented immediately
was tossed onto a dusty shelf
was given to the Smithsonian
was recognized and sold immediately
2: The original Edison light bulb
had a theoretically infinite lifetime
darkened over time because of tungsten
darkened over time because of carbon
used a metal filament
3: A diode
allows current to pass in one direction only
is made only from vacuum tubes
is made only from semiconductors
allows current to pass freely in both directions
4: The Audion
was a commercial failure
was a triode invented by Fleming
was a diode used in early radios
was a triode invented by DeForest
5: Controlling a large voltage or current with a small voltage or current is called
amplification
rectification
oscillation
transmogrification
6: Pentode vacuum tubes have ________ elements
4
5
6
7
7: A vacuum tube may be a(n)
amplifier
oscillator
diode rectifier
all of the above
8: The "all american five"
refers to the Notre Dame front line
were Hoover, Roosevelt, Truman, Eisenhower, and Kennedy
was a popular radio design
was a type of vacuum tube
9: The filament voltage of a series string in a home radio could be designed to run directly from
a 6 volt car battery
a 12 volt car battery
120 volts AC
240 volts DC
10: There are still vacuum tube designs on the market for
music amplifiers
satellite receivers
new car radios
submarine receivers
11: Pure silicon is a good
conductor
insulator
semiconductor
superconductor
12: "Doping" silicon with certain impurities turns it into a
conductor
insulator
semiconductor
superconductor
13: Silicon comes from the ______ column of the chemical periodic table
1
2
3
4
14: Boron, aluminum, gallium and indium make ________ type semiconductors and come from the ________ column of the periodic table
P, 3
N, 3
P, 5
N, 5
15: Phosphorus, arsenic, and antimony make ________ type semiconductor material and come from the _______ column of the periodic table
P, 3
N, 3
P, 5
N, 5
16: Doping one edge of P type semiconductor with an excess of N type impurity turns the semiconductor into a
transistor
diode
thermistor
triode
17: The tiny area between the N type and the P type material is called the _________ or _________ region
extrinsic, enhancement
junction, diode
intrinsic, depletion
extrinsic, diode
18: Diodes conduct current when biased in the________ direction
reverse
forward
negative
positive
19: A reverse biased diode makes a good __________ and a good ___________
rectifier, LED
switch, LED
rectifier, switch
variable capacitor, voltage regulator
20: All diodes are sensitive to
light unless there is an optical barrier
light of any sort
infrared
ultraviolet
21: A 1N4148 is a
vacuum tube
rectifier diode
switching diode
unipolar diode
22: The stripe around one end of a diode case designates the
anode
cathode
diode
filament
23: A 1 kilohm (1.0K) resistor is color coded
brown-black-black-gold
brown-black-brown-gold
brown-black-red-gold
brown-black-orange-gold
24: It appears as though a diode begins to conduct in the forward direction somewhere around
100 millivolts
400 millivolts
700 millivolts
1 volt
25: A zener diode makes a good
oscillator
amplifier
rectifier
voltage regulator

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