December 1962 Popular Electronics
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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?
Here are other Popular Electronics quizzes:
- Lamp Brightness Quiz, January
- Graph Interpretation
Quiz, April 1967
Quizoo, October 1962
Electronic Photo Album Quiz, Mar 1963
Electronic Analogy Quiz, Nov
- Electronic Alphabet Quiz,
- RC Circuit Quiz, Jun 1963
- Diode Quiz, Jul 1961
Kool-Keeping Kwiz, Jun 1970
- Electronic Curves Quiz, Feb
- Electronic Numbers
Quiz, Dec 1962
Conversion Quiz, Apr 1963
Coil Function Quiz, Jun 1962
- Electronics Analogy Quiz, Aug
- Audio Quiz, April 1955
- Electronic Unit Quiz, May
- Capacitor Circuit Quiz, Jun
- Magnetic Phenomena
Quiz, Feb 1962
Electronics Geography Quiz, Apr 1970
Electronic Menu Quiz, Aug
- Electronic Noise Quiz, Aug
- Electronic Current
Quiz, Oct 1963
Electronic Inventors Quiz, Nov
- Resistor Function Quiz, Jan
- Electronic Measurement
Quiz, Jan 1963
- Vacuum Tube
Quiz, Feb 1961
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