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 ___
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
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