# Plug and Jack QuizDecember 1967 Popular Electronics

 December 1967 Popular Electronics   Table of Contents Wax nostalgic about and learn from the history of early electronics. See articles from Popular Electronics, published October 1954 - April 1985. All copyrights are hereby acknowledged.

Thank God It's Friday (TGIF) once again. I keep looking back through issues of Popular Electronics magazine for Robert Balin quizzes that I might have missed, and fortunately this one was found. Unlike quizzes back in school, nobody but you will ever know how you score on it - that's what makes it fun. Your challenge is to determine the total resistance value between points A and B both before and after inserting the plug into the jack. Mercifully, Mr. Balin specifies that all the resistors are the same value. The Before part is a piece of cake even for someone in a first semester electronics course - just be sure to pay attention to whether or not the contacts short out any of the paths. The phono plug is on the left and the corresponding jack is on the right. Interpret the dual resistors plug circuits in figures 5 through 8 as having one resistor connected to the tip contact and the other resistor connected to the ring contact (see drawing below), so each connects individually to the upper and lower contacts when inserted into its jack.

## Plug and Jack Quiz

By Robert P. Balin

Plugs and jacks are used not only to connect various units of electronic equipment together, but also to perform a variety of switching operations at the same time. To test your ability to analyze plug and jack connections, sharpen your pencil and try working the circuit problems (1-8) shown below. Determine the total equivalent resistance between points A and B in each circuit Before and After the plug is inserted in the jack. All of the resistors are 6-ohm units.

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.

 Electronics IQ Quiz - May 1967 Plug and Jack Quiz - December 1967 Electronic Switching Quiz - October 1967 Electronic Angle Quiz - September 1967 International Electronics Quiz - July 1967 Bridge Circuit Quiz -December 1966 Diode Function Quiz - August 1965 Diagram Quiz, August 1966 TV Trouble Quiz, July 1966 Electronics History Quiz, December 1965 Scope-Trace Quiz, March 1965 Electronic Circuit Analogy Quiz, April 1973 Test Your Knowledge of Semiconductors, August 1972 Ganged Switching Quiz, April 1972 Lamp Brightness Quiz, January 1969 Lissajous Pattern Quiz, September 1963 Electronic 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 Inductance Quiz, September 1961 RC Circuit Quiz, June 1963 Diode Quiz, July 1961 Electronic Curves Quiz, February 1963 Electronic Numbers Quiz, December 1962 Energy Conversion Quiz, April 1963 Coil Function Quiz, June 1962 Semiconductor Quiz - February 1967 Unknown Frequency Quiz - September 1965 Electronics Metals Quiz - October 1964 Electronics Measurement Quiz - August 1967 Meter-Reading Quiz, June 1966 Electronic Geometry Quiz, January 1965 Electronic Factor Quiz, November 1966 Electronics Math Quiz, November 1965 Series Circuit Quiz, May 1966 Electrochemistry Quiz, March 1966 Electronic Analogy Quiz, November 1961 Electronic Coupling Quiz, August 1973 Electronics Analogy Quiz, August 1960 Audio Quiz, April 1955 Electronic 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 Resistor Function Quiz, January 1962 Electronic Measurement Quiz, January 1963 Vacuum Tube Quiz, February 1961 Kool-Keeping Kwiz, June 1970

1)  6 ohms 10 ohms

2)  18 ohms 9 ohms

3)  12 ohms 4 ohms

4)  6 ohms 15 ohms

5)  18 ohms 3.8 ohms

6)  12 ohms 14 ohms

7)  6 ohms 4.3 ohms

8)  12 ohms 2.4 ohms

Posted September 28, 2018

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