June 1963 Popular Electronics
Table
of Contents
Wax nostalgic about and learn from the history of early electronics. See articles
from
Popular Electronics,
published October 1954 - April 1985. All copyrights are hereby acknowledged.
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Having worked around resistors
and capacitors for more than four decades comes in handy when presented with 'simple'
quizzes like this one that appeared in a 1963 Popular Electronics dealing
with RC circuits. Still, there is always some trepidation involved when being subject,
even voluntarily, to a test of any sort, regardless of whether you are fairly confident
that it will be a lead pipe cinch, a cake walk, child's play, so to speak. Even
if nobody else will bear witness to your effort, you would feel like a real moron
if you missed even one of those simple questions that anyone with your level of
experience should get right without even having to think about it. Such is the irrational
fear I have when taking these quizzes prior to posting them on RF Cafe. I have always
been honest about the results, and there have been instances where I missed a couple
that I shouldn't have by all rights (or wrongs). This time, however, Lady Luck was
with me and I aced it. If you're not accustomed to seeing those strange round schematic
symbols with a mix of solid and dashed horizontal lines within, those are vacuum
tubes. Just mentally substitute your favorite solid state amplifier like a bipolar
of a field effect transistor.
RC Circuit Quiz
By Robert P. Balin
Circuits that are made up of resistors and capacitors only perform a wide variety
of functions in electronic equipment. Try to match the RC circuit functions listed
(1-10) with the circuits (A-J) to which they apply.
Answers are at the bottom of the page.
1 Decoupling network ____
2 Treble-cut tone control ____
3 Differentiator ____
4 Frequency control ____
5 Phase-shifting network ____
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6 Timing control ____
7 Equalizer ____
8 Integrator ____
9 Band suppression filter ____
10 RC coupling circuit ____
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Quizzes from vintage electronics magazines such as Popular
Electronics, Electronics-World, QST, and Radio News were published
over the years - some really simple and others not so simple. Robert P. Balin
created most of the quizzes for Popular Electronics. This is a listing
of all I have posted thus far.
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-
Elementary
Radio Quiz - December 1947 Radio-Craft
- Hi-Fi
Quiz - October 1955 Radio & Television News
- Electronics Physics
Quiz - March 1974 Popular Electronics
- A Baffling Quiz
- January 1968 Popular Electronics
- Electronics IQ
Quiz - May 1967 Popular Electronics
- Plug and Jack
Quiz - December 1967 Popular Electronics
- Electronic
Switching Quiz - October 1967 Popular Electronics
- Electronic
Angle Quiz - September 1967 Popular Electronics
- International
Electronics Quiz - July 1967 Popular Electronics
- FM Radio
Quiz - April 1950 Radio & Television News
- Bridge Circuit
Quiz -December 1966 Popular Electronics
- Diode Function
Quiz - August 1965 Popular Electronics
- Diagram Quiz,
August 1966 Popular Electronics
- Quist Quiz - November
1953 QST
- TV Trouble Quiz,
July 1966 Popular Electronics
- Electronics History Quiz,
December 1965 Popular Electronics
- Scope-Trace Quiz,
March 1965 Popular Electronics
-
Electronic
Circuit Analogy Quiz, April 1973
-
Test Your Knowledge of Semiconductors, August 1972 Popular Electronics
- Ganged Switching
Quiz, April 1972 Popular Electronics
- Lamp Brightness
Quiz, January 1969 Popular Electronics
- Lissajous Pattern Quiz, September 1963 Popular Electronics
- Electronic
Quizoo, October 1962 Popular Electronics
- Electronic Photo Album Quiz, March 1963 Popular Electronics
- Electronic Alphabet Quiz, May 1963 Popular Electronics
- Quiz: Resistive?
Inductive? or Capacitive?, October 1960 Popular Electronics
- Vector-Circuit Matching Quiz, June 1970 Popular Electronics
- Inductance
Quiz, September 1961 Popular Electronics
- RC Circuit Quiz,
June 1963 Popular Electronics
- Diode Quiz, July
1961 Popular Electronics
- Electronic Curves Quiz, February 1963 Popular Electronics
- Electronic Numbers Quiz, December 1962 Popular Electronics
- Energy Conversion Quiz, April 1963 Popular Electronics
- Coil Function
Quiz, June 1962 Popular Electronics
-
Co-Inventors Quiz - January 1965 Electronics World
-
"-Tron" Teasers Quiz - October 1963 Electronics World
- Polarity Quiz
- March 1968 Popular Electronics
-
Television
I.Q. Quiz - October 1948 Radio & Television News
- Amplifier Quiz
Part I - February 1964 Popular Electronics
- Semiconductor
Quiz - February 1967 Popular Electronics
- Unknown
Frequency Quiz - September 1965 Popular Electronics
- Electronics
Metals Quiz - October 1964 Popular Electronics
- Electronics
Measurement Quiz - August 1967 Popular Electronics
- Meter-Reading
Quiz, June 1966 Popular Electronics
- Electronic
Geometry Quiz, January 1965 Popular Electronics
- Electronic
Factor Quiz, November 1966 Popular Electronics
- Electronics
Math Quiz, November 1965 Popular Electronics
- Series Circuit
Quiz, May 1966 Popular Electronics
- Electrochemistry
Quiz, March 1966 Popular Electronics
- Biz
Quiz: Test Your Sales Ability - April 1947 Radio News
- Electronic
Analogy Quiz, November 1961 Popular Electronics
- Electronic
Coupling Quiz, August 1973 Popular Electronics
- Electronics Analogy Quiz, August 1960 Popular Electronics
- Audio Quiz, April
1955 Popular Electronics
- Electronic Unit
Quiz, May 1962 Popular Electronics
- Capacitor
Circuit Quiz, June 1968 Popular Electronics
- Quiz on AC Circuit Theory, December 1970 Popular Electronics
- Magnetic Phenomena Quiz, February 1962 Popular Electronics
- Electronics Geography Quiz, April 1970 Popular Electronics
- Electronic
Menu Quiz, August 1963 Popular Electronics
- Electronic Noise Quiz, August 1962 Popular Electronics
- Electronic Current Quiz, October 1963 Popular Electronics
- Electronic Inventors Quiz, November 1963 Popular Electronics
- Resistor Function
Quiz, January 1962 Popular Electronics
- Electronic Measurement Quiz, January 1963 Popular Electronics
- Vacuum Tube Quiz,
February 1961 Popular Electronics
- Kool-Keeping Kwiz, June
1970 Popular Electronics
- Find the Brightest
Bulb Quiz, April 1960 Popular Electronics
-
Where Do the Scientists Belong? - Feb 19, 1949 Saturday Evening
Post
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RC Circuit Quiz Answers
1 - D - A Decoupling Network acts as a low-pass filter so that signal frequencies
are bypassed to ground
and not coupled to other stages via the power supply.
2 - A - A Treble-cut Tone Control in the plate circuit of an audio amplifier
acts as a low-pass filter. Decreasing
the amount of resistance bypasses an increasing amount of the highs to ground.
3 - G - A Differentiator is a high-pass filter which removes low-frequency components
of a square wave.
Capacitor charges very quickly and permits only short pulses of current through
resistor.
4 - J - The Frequency Control circuit for this blocking oscillator biases the
transistor to cutoff until the capacitor
has discharged through the resistor. The capacitor then charges up again through
the transistor when it
begins to conduct.
5 - F - The Phase-Shifting Network to provide in-phase (positive) feedback for
this oscillator consists of three
cascaded RC circuits, The voltage across each resistor leads the signal applied
to each RC section
by 60 degrees.
6 - E - The Timing Control for this time delay circuit is an RC circuit which
controls the transistor emitter-base
biasing. The relay remains energized until the capacitor is charged and opposes
the forward bias
provided by the battery.
7 - I - An Equalizer for a crystal phonograph cartridge is a low-pass filter
designed to compensate for the
attenuation of low frequencies in disc recordings.
8 - B - An Integrator is a low-pass filter which removes high frequencies from
a square wave, In this
long-time-constant circuit, the capacitor charges and discharges slowly through
the resistor.
9 - C - A Band Suppression Filter such as this Wien bridge contains both series
and parallel RC circuits which
balance with the resistive arms to null the output signal at a particular frequency.
10 - H - An RC Coupling Circuit is really a form of high-pass filter; capacitor
must be large enough in proportion
to resistor to pass the lowest signal frequency without excessive attenuation.
Posted July 2, 2019(original 4/22/2014)
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