Electronic Analogy Quiz
August 1960 Popular Electronics
August 1960 Popular Electronics
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 analogy quiz is a little easier than many of the others published in Popular Electronics magazine 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. Wikipedia has a huge page describing many of the most familiar mechanical-electrical analogies.
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.
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.
- 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 - 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
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.
3. 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 October 29, 2019 (original 11/18/2013)
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