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 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 ___
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.
- Scope-Trace Quiz,
March 1965 Popular Electronics
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
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 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
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
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