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Leyden Jar. Ernie’s Leyden jar: Aluminum foil inside and outside of a “plastic beer” glass Diameter ~2” height of foil 2” Plastic thickness 0.037” Capacitance 0.077 nF, 81 pF or about 80 pF (puff) Dr. J’s Capacitance 25 pF.
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Leyden Jar • Ernie’s Leyden jar: Aluminum foil inside and outside of a “plastic beer” glass • Diameter ~2” height of foil 2” • Plastic thickness 0.037” • Capacitance • 0.077 nF, 81 pF or about 80 pF (puff) • Dr. J’s Capacitance 25 pF http://www.circuitstoday.com/wp-content/uploads/2009/12/Leyden-Jar.jpg Originally, the amount of capacitance was measured in number of 'jars' of a given size, or through the total coated area, assuming reasonably standard thickness and composition of the glass. A typical Leyden jar of one pint size has a capacitance of about 1 nF. http://en.wikipedia.org/wiki/Leyden_jar http://static.howstuffworks.com/gif/capacitor-5.gif Document Title/Description