October 1963 Popular Electronics
Table of Contents
People old and young enjoy waxing nostalgic about and learning some of the history
of early electronics. Popular Electronics was published from October 1954 through April 1985. All copyrights
are hereby acknowledged. See all articles from
This Electronics Current Quiz from the October 1963 edition
of Popular Electronics is recent enough (if you can consider
50 years ago) that it uses both transistors as well as vacuum
tubes in the example circuits. I have to admit to only scoring
60% on it, which is pretty lame. You will probably do better,
especially if you are my age or older.
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 ___
Field current ___
J Beam current ___
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.
- 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
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
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 voltage.
D - 5 EDDY currents are induced
in the work piece by transformer action in the r.f. induction
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.
- 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
J - 1 The BEAM current in a cathode-ray
tube is the electron stream which is accelerated toward the
fluorescent screen .
Posted January 31, 2013