October 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.
This Electronics Current
Quiz from the October 1963 edition of Popular Electronics is recent enough
(if you consider half a century ago to be recent) that it uses both transistors
as well as vacuum tubes in the example circuits. I have to admit to only scoring
60% on the quiz, which is pretty lame. You will probably do better, especially if
you are my age or older. As when looking up the solution to problems in the back
of the textbook and the answers seem obvious (well, not always), so too do these.
Electronic Current Quiz
By Robert P. Balin
Despite the fact that any electric current is a movement of electric charges,
a variety of odd names have been devised for currents that operate specific electronic
circuits or parts. See if you can match each special current name (A-J) listed below
with the circuit of the component (1-10) to which it relates.
A) Pull-in current ___
B) Exciting current ___
C) Bleeder current ___
D) Eddy current ___
E) Dark current ___
F) Bias current ___
G) Leading current ___
H) Leakage current ___
I) Field current ___
J) Beam current ___
See answers below.
Popular Electronics published many quizzes over the years
- some really simple and others not so simple. Robert P. Balin created many of the quizzes.
This is a listing of all I have posted thus far.
- A Baffling Quiz
- January 1968
- Electronics IQ Quiz
- May 1967
- Plug and Jack Quiz
- December 1967
Switching Quiz - October 1967
Angle Quiz - September 1967
Electronics Quiz - July 1967
- Bridge Circuit
Quiz -December 1966
- Diode Function
Quiz - August 1965
- Diagram Quiz, August
- TV Trouble Quiz,
- Electronics History Quiz,
- Scope-Trace Quiz,
Circuit Analogy Quiz, April 1973
Your Knowledge of Semiconductors, August 1972
- Ganged Switching
Quiz, April 1972
- Lamp Brightness
Quiz, January 1969
- Lissajous Pattern Quiz, September 1963
Quizoo, October 1962
- Electronic Photo Album Quiz, March 1963
- Electronic Alphabet Quiz, May 1963
- Quiz: Resistive?
Inductive? or Capacitive?, October 1960
- Vector-Circuit Matching Quiz, June 1970
Quiz, September 1961
- RC Circuit
Quiz, June 1963
- Diode Quiz,
- Electronic Curves Quiz, February 1963
- Electronic Numbers Quiz, December 1962
- Energy Conversion Quiz, April 1963
Function Quiz, June 1962
Quiz Part I - February 1964
Quiz - February 1967
- Unknown Frequency
Quiz - September 1965
Metals Quiz - October 1964
Measurement Quiz - August 1967
- Meter-Reading Quiz,
Geometry Quiz, January 1965
Factor Quiz, November 1966
Math Quiz, November 1965
- Series Circuit Quiz,
Quiz, March 1966
- Electronic Analogy
Quiz, November 1961
Coupling Quiz, August 1973
- Electronics Analogy Quiz, August 1960
- Audio Quiz,
Unit Quiz, May 1962
Capacitor Circuit Quiz, June 1968
- Quiz on AC Circuit Theory, December 1970
- Magnetic Phenomena Quiz, February 1962
- Electronics Geography Quiz, April 1970
Electronic Menu Quiz, August 1963
- Electronic Noise Quiz, August 1962
- Electronic Current Quiz, October 1963
- Electronic Inventors Quiz, November 1963
Function Quiz, January 1962
- Electronic Measurement Quiz, January 1963
Tube Quiz, February 1961
- Kool-Keeping Kwiz, June
- Find the
Brightest Bulb Quiz, April 1960
Current Quiz Answers
A - 10 The PULL-IN current for a relay is the minimum coil current that will
move the armature to the closed position.
B - 6 The EXCITING current in a transformer is the primary current which flows
when the secondary winding is open.
C - 3 A BLEEDER current, usually about 10% of the rated output current, flows
in the bleeder resistor of a power supply, and improves the regulation of the output
D - 5 EDDY currents are induced in the work piece by transformer action in the
r.f. induction heating process.
E - 4 The DARK current in a photoelectric tube is the current which flows in
the absence of light.
F - 2 The d.c, BIAS current in a transistor common-emitter circuit determines
the operating point for the signal current.
G - 8 A LEADING current is present in a capacitive circuit because of the current
surges into the capacitor.
H - 9 The LEAKAGE current, or Iceo in a transistor, is the collector
current which flows with zero base current.
I - 7 The FIELD current is the current that energizes the electromagnet of an
electrodynamic loudspeaker. It is often obtained by using the field coil as the
choke in the amplifier power supply.
J - 1 The BEAM current in a cathode-ray tube is the electron stream which is
accelerated toward the fluorescent screen.
Posted May 8, 2019