TY - JOUR
AU - Jensen, Harald C.
AB -  Lake Forest Colle^e^ Lake Forest^ Illinois Many concepts of physics ordinarily difficult to demonstrate become easy to illustrate if one is able to find just the right combination of elements for the demonstration equipment. The apparatus pictured in figure one for showing series resonance is a case in point. Only three components are required. While these are easy to secure and are relatively inexpensive, the combination tunes quite sharply to the ordinary 60 cycle per second frequency of the power line. The resistor R is simply a 120 volt 7 watt light bulb such as those used for Christmas tree lighting. The inductor L is a filter choke1 designed for use in power supplies of electronic devices. It should have an inductance between 10 and 15 henries and a current capacity of about 30 milliamperes. The specifications for the variable capacitor C are more stringent. The Cornell-Dubilier dial decade capacitor2 with a range of 0.01 to 1.1 microfarads in steps of 0.01 microfarads is, however, a very satisfactory choice. The circuit connections are shown in figure two. As C is varied from maximum to minimum, the condition of resonance is indicated FIG. 1. Sketch of circuit useful for 
TI - Series Resonance (Seventh in a Series)
JF - School Science and Mathematics
DO - 10.1111/j.1949-8594.1958.tb08093.x
DA - 1958-11-01
UR - https://www.deepdyve.com/lp/wiley/series-resonance-seventh-in-a-series-iWPMfiw2HD
SP - 634
VL - 58
IS - 8
DP - DeepDyve
ER -