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Electronic Geometry Quiz
January 1965 Popular 
Electronics

						






				
    







January 1965 Popular Electronics


January 1965 Popular Electronics Cover - RF CafeTable 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.









All of these technology-related 
quizzes from my collection of vintage Popular Electronics magazines 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 assign a Millennial handicap on item "E" if you spaz out over the picture 
because of your relative youth, but if you get the other nine correct, you'll get 
all ten by default. This is might be the least challenging of Mr. Balin's quizzes 
(I easily got 10:10). Go ahead and give it a try.


Electronic Geometry Quiz


By Robert P. Balin 




Electronics Geometry Quiz (A) - RF Cafe


Electronics Geometry Quiz (C) - RF Cafe






Electronics Geometry Quiz (B) - RF Cafe


Electronics Geometry Quiz (D) - RF Cafe




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 ___ 


Electronics Geometry Quiz (E) - RF Cafe


Electronics Geometry Quiz (F) - RF CafeElectronics Geometry Quiz (G) - RF CafeElectronics Geometry Quiz (H) - RF Cafe


Electronics Geometry Quiz (I) - RF CafeElectronics Geometry Quiz (J) - RF Cafe


See answers below.






Quizzes from vintage electronics magazines such as Popular 
Electronics, Electronics-World, QST, 
Radio-Electronics, 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.







RF Cafe Quizzes



Vintage Electronics Magazine 
Quizzes



Vintage Electronics Magazine Quizzes





Vintage Electronics Magazine Quizzes









 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


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 August 7, 2024
(updated from original post 
on 6/1/2018)

			





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RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 
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