December 1947 Radio-Craft
Wax nostalgic about and learn from the history of early electronics.
See articles from Radio-Craft,
published 1929 - 1953. All copyrights are hereby acknowledged.
There is a good reason why Harold
Glenn called this an "Elementary Radio Quiz." It appeared in a 1947 issue of
Radio-Craft magazine. If you have been in the analog and RF electronics field
for more than a couple years and don't score 100%, it has to be due to a misreading
of accidental selecting of the wrong answer. I know what you're thinking - "The
fool must have screwed up and missed at least one and is making excuses." Not this
time - although I don't deny it could have happened. Anyway, it might be a fun quiz
to pass out in the break room or maybe present it to a Ph.D. candidate during an
interview ;-) "Bonne chance!," as
Louis LeBeau might say!.
Elementary Radio Quiz
By Harold Glenn
Check your radio knowledge. A more advanced quiz will appear in an early issue.
1. Light and electricity are energy, and travel in the form of:
2. Which has the longest wave length?
3. The inductor is:
a. a coil
b. a condenser
c. an air core
d. an iron core
4. The to-and-fro surge of an electric current in a circuit is called:
5. The loudspeaker changes:
a. sound into electric waves
b. r.f. to a.f.
c. a.f. to r.f.
waves into sound waves
6. In order to operate, the loudspeaker must have:
a. r.f. waves
b. a.f. waves
c. pure direct current
d. pure a.c. sine
7. The purpose of the detector is to change:
a. a.f. to r.f.
b. r.f. to a.f.
c. resonance to oscillation
8. The action of the detector is called:
9. Resistance in the tuned circuit causes:
c. broad tuning
10. What is the frequency of 60-cycle, 117-volt, 100-watt house current?
Answers to Quiz on page 83
10. 60 cycles
Posted December 3, 2020