File:Cavallo's multiplier labelled.jpg
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Captions
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Summary
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| Description |
English: Cavallo's multiplier: a 1795 device to amplify a small electric charge so that it could be detected by the electroscopes of the day.
The charge to be multiplied was applied to a metal plate A, which was supported on an insulating glass post. A moveable insulated metal plate B was brought close to A (though not permitted to touch it), and then grounded via a conducting wire F making contact with an earthed pin E. The charge on A caused charge separation on B due to electrostatic induction. Plate B was then moved away with the handle G, breaking its earth connection with E. Since B was insulated, it acquired and retained a small charge opposite in sign to the charge on A. Plate B was then brought into electrical contact with the third metal plate C, which was insulated. Since both B and C were conducting, B would transfer a portion of its charge to C. To maximise the transferred charge, C was placed in close proximity to a final metal plate D, which was earthed. This image was generated in POV-Ray v3.6. The code used to generate the image has been posted to the talk page. |
| Source | Own work |
| Author | BillC |
| Other versions | Image:Cavallo-multiplier-1.jpg |
References
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- Gray, John (1890) Electrical Influence Machines, Whittaker, pp. pp.80–81
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 13:43, 2 November 2008 | | 1,137 × 802 (123 KB) | BillC (talk | contribs) | {{Information |Description={{en|1=Cavallo's multiplier: a 1795 device to amplify a small electric charge so that it could be detected by the electroscopes of the day. The charge to be multiplied was applied to a metal plate A, which was supported on an i |
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