June 1968 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. 
Here
is a nice quiz on calculating total equivalent capacitance for circuits containing various combination of series,
parallel, and seriesparallel connections. To help in calculation, all of the individual capacitor values are the
same. Many of them you can probably solve in your head, especially if you mentally rearrange the circuit into a
more readily recognizable configuration. For instance, circuit #1 can be redrawn having two parallel branches across
the source. One branch has just a single capacitor while the other has two parallel capacitors in series with one
capacitor. The equation is then C + (2C^{2}/3C) = C + 2/3C
= 5/3C. For C = 6 pF, C_{total} = 5/3*6 pF = 10 pF.
See all articles from Popular
Electronics.Capacitor Circuit
Quizby Robert P. Balin
Capacitors are not only used as single units in electronic
circuits, but are often combined in series or parallel with other capacitors. When connected in series, capacitors
add like resistors in parallel. The exact formula for adding any two out of any number of capacitors in series is:
C_{T} = C1 x C2/C1 + C2. When connected in parallel, capacitors add like resistors in series, so that the
total capacitance is equal to the sum of the separate values. To test your skill at working capacitor problems,
try to find the total effective capacitance available in each of the circuits (110) shown below. Each capacitor
is rated at 6 pF. Hint: Beware of capacitors that might be shorted out. Answers are at the bottom of the page.
Here are other Popular Electronics quizzes: 

RC Circuit Quiz, Jun 1963 
Diode Quiz, Jul 1961 
KoolKeeping 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 
Capacitor Quiz Answers
1 10 pF
2 6 pF
3 12 pF
4 9 pF
5 16 pF
6 8 pF
7
5 pF
8 3 pF
9 15 pF
10 4 pF Posted 7/4/2013
