November 1961 Popular Electronics
Table of Contents
Wax nostalgic about and learn from the history of early electronics. See articles
published October 1954 - April 1985. All copyrights are hereby acknowledged.
It is common in electronics courses for an analogy to be drawn
between electrical and mechanical phenomena. In fact, a lot
of circuit analysis methods and equations apply directly to
mechanics, and vice versa. An LC (inductor-capacitor) oscillating
tank circuit is akin to a spring and dashpot. Resistance of
a wire is likened to skin friction of water flowing through
a hose. Who among us can forget those lessons? This Electronic
Analogy Quiz from the November 1961 edition of Popular Electronics
presents a challenge both because some not-so-familiar examples
of analogies are offered, and because some are a real stretch.
Therefore, don't feel too bad if you don't get a few. That's
my way of saying that I didn't get all of them right ;-) Answers
and explanations are at the bottom of the page.
Electronic Analogy Quiz
Electronic circuits perform functions similar to many mechanical
devices and natural phenomena, and finding an analogy between
them often leads to a better understanding of both. See if you
can match the numbered electronic circuits on the left with
the lettered sketches on the right.
Popular Electronics published many quizzes over the years - some
really simple and others not so simple. Robert Balin created many of the quizzes. This is
a listing of all I have posted thus far.
- Test Your
Knowledge of Semiconductors, August 1972
- Ganged Switching Quiz,
- Lamp Brightness Quiz,
Lissajous Pattern Quiz, September 1963
Quizoo, October 1962
Photo Album Quiz, March 1963
Alphabet Quiz, May 1963
- Quiz: Resistive?
Inductive? or Capacitive?, October 1960
Vector-Circuit Matching Quiz, June 1970
Quiz, September 1961
- RC Circuit Quiz,
- Diode Quiz, July
Curves Quiz, February 1963
Electronic Numbers Quiz, December 1962
Conversion Quiz, April 1963
- Coil Function
Quiz, June 1962
Analogy Quiz, August 1960
- Audio Quiz,
Unit Quiz, May 1962
Circuit Quiz, June 1968
on AC Circuit Theory, December 1970
Magnetic Phenomena Quiz, February 1962
Electronics Geography Quiz, April 1970
Menu Quiz, August 1963
Noise Quiz, August 1962
Current Quiz, October 1963
- Electronic Inventors Quiz, November 1963
Function Quiz, January 1962
Measurement Quiz, January 1963
- Vacuum Tube
Quiz, February 1961
- Kool-Keeping Kwiz, June
Electronic Analogy Quiz Answers
1. Low-pass filter
A low-pass filter "clips off" signals above a
certain frequency; a tunnel "clips off" objects above a certain
2. Zener diode regulator
D. Centrifugal governor
A zener diode "resists" changes
in voltage; a governor resists changes in speed.
3. Push-pull circuit
H. Two-man saw
A signal is alternately "pushed" and "pulled"
in a push-pull circuit; a two-man saw is alternately "pushed"
and "pulled" by its operators.
4. Wave trap
A. Drain trap
A wave trap removes unwanted signals; a drain
trap "removes" unwanted odors.
5. Smoothing filter
C. Coil spring suspension
A filter "absorbs" signal
"peaks" before they reach the associated circuits; a spring
"absorbs" vibration "peaks" before they reach the associated
6. Diode clipper
E. Hedge clipper
A diode clipper "clips" off "peaks" in
a signal; a hedge clipper" clips" of "peaks" in a hedge.
7. High-pass filter
A high-pass filter obstructs the passage of
signals below a certain frequency; a mountain obstructs the
passage of objects below a certain height.
8. A.C. rectifier
An a.c. rectifier allows current to
flow in one direction ; a ratchet-and-pawl allows a shaft to
turn in one direction.
Posted September 20, 2012