January 1963 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.
The early 1960s was evidently a good time for printing quizzes
in electronics magazines. Popular Electronics was no exception.
As I look through my collection I am finding quite a few. Here
is the latest, from the January 1963 edition, that tests basic
knowledge of using analog multimeters (digital types were not
around yet). I managed to get all the ones I tried correct,
but with question 9 I thought maybe it was a trick question,
so I didn't bother venturing a guess. Give it a try for yourself.
Electronic Measurement 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.
Circuit Analogy Quiz, April 1973 Popular Electronics
- 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
- Electronic Analogy
Quiz, November 1961 Popular Electronics
- Electronic Coupling
Quiz, August 1973 Popular Electronics
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
Measurement Quiz Answers
1 TRUE. If a voltmeter
is rated at 20,000 ohms-per-volt, it has an input resistance
of 100 times 20,000 ohms on its 100-volt scale, and 600 times
20,000 ohms on its 600-volt scale. The higher this shunting
resistance is, the less it reduces the resistance across which
the voltage is measured.
2 FALSE. If the instrument
does not have a transit (shorting) position, set it on its highest
current range-because the meter will then be using its lowest
value of shunt resistance. If the meter coil is jiggled while
being moved, the voltage it generates can produce the largest
amount of damping current.
3 TRUE. Glass-and .especially
plastic-meter faces will have a static charge built up on them
when they are rubbed with a dry cloth. The static charges will
attract the needle on the inside, and more dust on the outside.
Use a cloth dampened with anti-static fluid (such as Weston's
4 FALSE. Use the highest current range because
the ammeter pointer is least apt to "pin" against a stop. Once
the current magnitude has been determined, step down to lower
5 TRUE. Meter friction due to worn bearings
or dirt tends to make the needle stop too soon when it is slowing
down for an indication.
6 FALSE. Most meters are of
the D'Arsonval type, which responds to the average value of
the signal waveform. An a.c. meter scale increases this reading
by a factor of 1.11 in order to indicate r.m.s. values of sine
waves. For a square wave, r.m.s. and average are the same; hence,
the factor is not needed and the meter will read high.
7 TRUE. An ammeter deflects correctly when electrons enter
its negative terminal and leave by its positive terminal.
8 TRUE. If the accuracy of a meter is given, for example,
as 3 % of full scale deflection, it means that a reading taken
anywhere on that particular range is accurate to only 3% of
the total range on that scale. Therefore, if reading accuracy
is what you want, select the smallest range that can indicate
9 FALSE. When determining low resistances,
don't measure the voltage drop across both the unknown resistance
and the ammeter. The ammeter resistance might be of the same
magnitude or greater than the unknown resistance and introduce
10 TRUE. In selecting the highest voltage
scale, you reduce the possibility of "pinning" the pointer against
a stop. Once the voltage magnitude is determined, step down
to lower voltage scales.
Posted August 22, 2012