December 1962 Popular Electronics
Wax nostalgic about and learn from the history of early electronics. See articles
published October 1954 - April 1985. All copyrights are hereby acknowledged.
Robert Balin created many quizzes for Popular Electronics magazine
back in the 1960s and 1970s. This particular Electronic Numbers
Quiz presents various objects and your challenge is to match
one of the provided numerical values to each item. For example,
a tuning fork is most commonly, in the Western world, associated
with a certain frequency for tuning musical instruments (electronic
and mechanical). As is often the case, being familiar with the
"standards" of the era is helpful on a few of the items like
the tuning capacitor and the IF transformer, but you should
be able to eliminate some options by knowing the impedance of
the twin lead transmission line and the phase relationship of
current and voltage in a pure inductance.
Electronic Numbers Quiz
By Robert P. Balin
Anyone in electronics gets to know many numbers, each of
which relates primarily to some specific circuit or component.
Why not try your luck at matching the eight numbers below with
the drawings (A - J) to which they most logically refer?
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
Numbers Quiz Answers
1.414 - F The maximum or peak value of a Sine
Wave is 1.414 times its effective or r.m.s value.
3.2 - C A common impedance for Speaker voice
coils is 3.2 ohms.
47 - A A type 47 Pilot Lamp is the one almost
always found in the "All-American 5" receiver.
90 - H Current through a pure Inductance lags
the applied voltage by a quarter of a cycle, or 90 degrees.
140 - G A common maximum capacitance value for
a Variable Capacitor is 140 μμf.
180 - B A signal fed into a Vacuum Tube between
grid and ground is inverted, or shifted 180° in phase, when
observed between plate and ground.
300 - J The impedance of TV and FM Twin Lead
is 300 ohms.
440 - E A Tuning Fork used to tune musical instruments
vibrates at 440 cycles, or A above middle C.
455 - I A common frequency for an I.F. Transformer
is 455 kc.
15,750 - D The frequency of the horizontal sweep
oscillator in a TV Set is 15,750 cycles.
Posted March 13, 2014