# Electronics IQ QuizMay 1967 Popular Electronics

 May 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.

Unlike those IQ (intelligence quotient) tests conceived of and administered by Ph.D. college professors with pulsating veins in their foreheads, this "Electronics IQ Quiz," created by Popular Electronics quizmaster Robert Balin, is a true measure of your real-world acumen. Here are a couple hints to assist quiz takers not familiar with last century electronics. You need to have knowledge of the NTSC-mandated broadcast television channel bandwidth for figure A, but you might be able to guess it by process of elimination. For figure E, consider the bandwidth limits in terms of dB, not MHz. Kinks in the characteristic curves of the tube alluded to in figure D betray its number (extra hint: it's not a diode or a triode). Good luck!

## Electronics IQ Quiz

By Robert P. Balin

Each of the sketches (A-I) below can be directly associated with a single digit (1-9) that helps to describe its purpose, or interprets its function. For example, in the sample sketch (X), the silver band on the resistor indicates a tolerance of ±10%. If you answer 9 out of 9, you're a genius; 7 correct answers is about average.

1 ___

2 ___

3 ___

4 ___

5 ___

6 ___

7 ___

8 ___

9 ___

10 _X__

Posted November 2, 2018

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 - I) The unijunction transistor has but one p-n junction.

2 - B) The voltage doubler output is approximately equal to two times its r.m.s. input.

3 - E) Audio equipment frequency response is measured within the half-power point on the curve - read as three db down.

4 - D) These curves, representing the characteristics of a tetrode (four-element vacuum tube) plate, display a negative resistance region.

5 -G) By Ohm's law, the current flowing in the circuit is five mA.

6 - A) Television channels are six MHz wide.

7 - C) This is the Morse code symbol for numeral seven.

8 - F) A figure-eight (Lissajous) pattern on a scope indicates that the scope's horizontal input is being fed a sine wave having twice the frequency of the vertical input signal.

9 - H) The "on" lamps are reading nine in the binary number system.

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