January 1965 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.
Unless I find one I missed from my collection of vintage Popular Electronics magazines, this could be the last Friday electronics quiz for a while. All of the quizzes were created by Robert p. Balin, and range in difficulty from relatively easy to head scratchers (for typical test takers like myownself). Sometimes modern readers will be stumped by references to dated drawings and/or terms like vacuum tubes and CRTs (which are themselves vacuum tubes, of course). This Electronics Geometry Quiz might require a Millennial handicap on item "E" if you spaz out over the picture, but if you get the other nine correct, you'll get all ten by default. This is might be the easiest yet (I easily got 10:10). Go ahead and give it a try.
Electronic Geometry Quiz
By Robert P. Balin
Often electronic components and circuits are named after their geometrical form or their. characteristic behavior curve. Examples are rhombic antennas, cosine deflection yokes, sine- and square-wave generators, etc. See if you can match the names of the curves and solids (1-10) at right with the drawings of their applications (A-J).
1 Cardioid ___
2 Catenary ___
3 Cone ___
4 Ellipse ___
5 Exponential ___
6 Helix ___
7 Paraboloid ___
8 Polyhedron ___
9 Toroid ___
10 Trapezoid ___
See answers below.
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.
- A Baffling Quiz
- January 1968
- Electronics IQ Quiz
- May 1967
- Plug and Jack Quiz
- December 1967
Switching Quiz - October 1967
Angle Quiz - September 1967
Electronics Quiz - July 1967
- Bridge Circuit
Quiz -December 1966
- Diode Function
Quiz - August 1965
- Diagram Quiz, August
- TV Trouble Quiz,
- Electronics History Quiz,
- Scope-Trace Quiz,
Circuit Analogy Quiz, April 1973
Your Knowledge of Semiconductors, August 1972
- Ganged Switching
Quiz, April 1972
- Lamp Brightness
Quiz, January 1969
- Lissajous Pattern Quiz, September 1963
Quizoo, October 1962
- Electronic Photo Album Quiz, March 1963
- Electronic Alphabet Quiz, May 1963
- Quiz: Resistive?
Inductive? or Capacitive?, October 1960
- Vector-Circuit Matching Quiz, June 1970
Quiz, September 1961
- RC Circuit
Quiz, June 1963
- Diode Quiz,
- Electronic Curves Quiz, February 1963
- Electronic Numbers Quiz, December 1962
- Energy Conversion Quiz, April 1963
Function Quiz, June 1962
Quiz - February 1967
- Unknown Frequency
Quiz - September 1965
Metals Quiz - October 1964
Measurement Quiz - August 1967
- Meter-Reading Quiz,
Geometry Quiz, January 1965
Factor Quiz, November 1966
Math Quiz, November 1965
- Series Circuit Quiz,
Quiz, March 1966
- Electronic Analogy
Quiz, November 1961
Coupling Quiz, August 1973
- Electronics Analogy Quiz, August 1960
- Audio Quiz,
Unit Quiz, May 1962
Capacitor Circuit Quiz, June 1968
- Quiz on AC Circuit Theory, December 1970
- Magnetic Phenomena Quiz, February 1962
- Electronics Geography Quiz, April 1970
Electronic Menu Quiz, August 1963
- Electronic Noise Quiz, August 1962
- Electronic Current Quiz, October 1963
- Electronic Inventors Quiz, November 1963
Function Quiz, January 1962
- Electronic Measurement Quiz, January 1963
Tube Quiz, February 1961
- Kool-Keeping Kwiz, June
- Find the
Brightest Bulb Quiz, April 1960
Geometry Quiz Answers
1 - J) Cardioid pattern graphically shows typical directional response characteristics of many good microphones.
2 - C) Catenary curve is the shape assumed by a long-line antenna freely suspended between two towers.
3 - H) Cone shape is the most common design for loudspeaker diaphragms.
4 - D) Ellipse as seen on the screen of an oscilloscope shows the phase relationship between two signals that are essentially the same.
5 - G) Exponential curve shows graphically the typical charging rate function of a capacitor.
6 - E) Helix is the shape of the grid winding in many vacuum tubes. Certain antennas for telemetry applications also have a helix-shaped element.
7 - A) Paraboloid is the shape of "dishes" used as signal-focusing reflectors for microwave equipment.
8 - I) Polyhedron is the form of multi-faced solid in which mineral crystals such as quartz are found.
9 - B) Toroid is a doughnut-shaped coil used in computer magnetic memory cores, integrated circuits, and other high efficiency applications.
10 - F) Trapezoid as seen on the screen of an oscilloscope can be interpreted to reveal the percent of amplitude modulation of a carrier signal.
Posted June 1, 2018