August 1960 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 (if any) are hereby acknowledged.
electronics analogy quiz is a little easier than a few of the others published in Popular
because all of the electrical and mechanical objects depicted here are very familiar.
The concepts might seem trivial to those of us who have been immersed in the science for decades,
but I for one can remember when first hearing these analogies how helpful they were. Not only
that, but I also recall during physics and mechanics courses in college being amazed at the similarity
of equations shared by electrical and mechanical processes.
See all articles from
Electronic Analogy Quiz
By Robert P. Balin
Analogies - or comparisons - between electrical and mechanical
phenomena are widely used to explain many electronic principles. See if you can match the lettered
objects to the numbered symbols in the boxes below. The correct match in each case, and a complete
explanation of the principles involved, will be found at the bottom of the page.
|Here are other Popular Electronics quizzes:
RC Circuit Quiz, Jun 1963
Diode Quiz, Jul 1961
Kool-Keeping Kwiz, Jun 1970
Electronic Curves Quiz, Feb 1963
Electronic Numbers Quiz, Decr 1962
Energy Conversion Quiz, Apr 1963
Coil Function Quiz, Jun 1962
Electronics Analogy Quiz, Aug 1960
Audio Quiz, April 1955
Electronic Unit Quiz, May 1962
Capacitor Circuit Quiz, Jun 1968
Magnetic Phenomena Quiz, Feb 1962
Electronics Geography Quiz, Apr 1970
Electronic Menu Quiz, Aug 1963
Electronic Noise Quiz, Aug 1962
Electronic Current Quiz, Oct 1963
Electronic Inventors Quiz, Nov 1963
Resistor Function Quiz, Jan 1962
Electronic Measurement Quiz, Jan 1963
Vacuum Tube Quiz, Feb 1961
Analogy Quiz Answers
I. G. Because of its magnetic field, an inductor
has the ability to resist any change in the amount or direction of the current flowing through
it - we call this property "electrical inertia." A heavy grinding wheel, because of its mass,
has mechanical inertia and tends to resist any change in its speed or direction of rotation.
2. D. A rectifier in an electrical circuit permits electron flow in only one direction.
A ratchet wheel and check pawl likewise permit rotation in only one direction.
C. A capacitor stores electrical energy in its dielectric when it is charged, and the energy is
recovered when you provide a discharge path for it. The coil spring in a jack-in-the-box stores
mechanical energy in its stressed turns when the spring is compressed; this energy is recovered
when you open the box.
4. H. A fuse element can carry little more than the normal
current for its circuit; when an overload occurs, it is the first thing to burn in two and thereby
open the circuit. The fuse may be compared, then, to the weakest link in a chain.
5. B. A resonant circuit will oscillate at a frequency determined by the inductance and capacitance
present. A tuning fork oscillates as well, but at a frequency determined by its mechanical construction.
6. A. A transformer takes electrical energy supplied to its primary winding as a large
current at low voltage and provides us with virtually the same amount of energy delivered as a
small current at high voltage from its secondary winding. A gear train receives mechanical energy
at high speed and low torque and converts it for use by a device requiring the same amount of
power supplied at low speed and high torque.
7. E. An open switch stops electron flow
in the same manner as a closed faucet stops the flow of water.
8. F. A resistor limits
the current in a circuit, but converts some of the electrical energy into heat while doing so.
The brake shoe on the wagon wheel limits the speed of its rotation, and changes some of the mechanical
energy into heat.
Posted November 18, 2013