File:Andreas_Cunaeus_discovering_the_Leyden_jar.png
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![File:Andreas Cunaeus discovering the Leyden jar.png](http://upload.wikimedia.org/wikipedia/commons/thumb/1/15/Andreas_Cunaeus_discovering_the_Leyden_jar.png/800px-Andreas_Cunaeus_discovering_the_Leyden_jar.png)
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原始文件 (1,260 × 916像素,文件大小:334 KB,MIME类型:image/png)
摘要
描述Andreas Cunaeus discovering the Leyden jar.png |
English: Artist's conception of the discovery of the Leyden jar. In 1746, Andreas Cunaeus, a pupil of Pieter von Muschenbroek in Leyden, attempts to "condense" electricity in a glass of water. The rotating glass sphere (right) is an electrostatic machine. The static electricity generated by the hands rubbing on it is transferred through the chain to the suspended metal bar, and from it via the hanging wire into the glass of water. The glass acted as a capacitor, and a large charge built up in the water, and an equal charge of the opposite polarity built up in Cunaeus' hand holding the glass. When Cunaeus reached up to pull the wire out of the water, he got a severe shock, much worse than an electrostatic machine could give, because the amount of charge stored was much larger than the terminal of an electrostatic machine could store. Cunaeus took two days to recover. Musschenbroek was also impressed by the powerful shock he received from the device, writing, "I would not take a second shock for the crown of France". Reports of the experiment were widely circulated, and scientists began to investigate the charge storage ability of these "Leyden flasks". Eventually the water was replaced by foil coatings on the inside and outside of the jar to store the charge. |
日期 |
在1886年之前 date QS:P,+1886-00-00T00:00:00Z/7,P1326,+1886-00-00T00:00:00Z/9 |
来源 | Downloaded August 12, 2013 from Augustin Privat Deschanel (1876) Elementary Treatise on Natural Philosophy, Part 3: Electricity and Magnetism, D. Appleton and Co., New York, translated and edited by J. D. Everett, p. 570, fig. 382 on Google Books |
作者 | The drawing seems to be signed 'Laplante' in the lower right corner |
许可协议
Public domainPublic domainfalsefalse |
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注解 InfoField | 该图片含有注解:在维基媒体共享资源上查看注解 |
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English: Electrostatic generator consisting of ball of glass rotated by belt from crank turned by assistent (not visible)
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English: Hands rubbing on glass generate static electric charge on glass
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English: Chain collects electric charge from glass, transfers it to metal bar
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English: Metal bar suspended by nonconducting silk cords transfers charge to hanging wire
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English: Hanging wire conducts charge from electrostatic machine to water
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The conductive water and Cuneus's hand supporting the jar, separated by the thin insulating glass, form a capacitor able to store charge. A large charge builds up in the water, and an opposite charge builds up in Cuneus's hand, attracted from ground.
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English: When Cuneus touches the wire, he provides a conductive path between the two charges. The charge from the water flows through his body to his other hand, discharging the charge that has built up, giving Cuneus a powerful shock. He was knocked to the ground.
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文件修改日期时间 | 2013年8月13日 (二) 20:55 |