File:Electroscope showing induction.png

原始檔案(797 × 684 像素,檔案大小:37 KB,MIME 類型:image/png

摘要

描述
English: Drawing of a gold leaf electroscope, an antique scientific instrument invented in 1787 by British clergyman Abraham Bennett that detects electric charge. It consists of a pair of delicate gold leaves hanging parallel to each other from a brass post, protected by a glass jar. The brass post projects from the mouth of the jar and ends in an electrode to which charged objects can be applied. When a charge is applied to the post, the leaves, carrying the same charge, repel each other, and diverge into a "V" shape. This example shows electrostatic induction of charge in the instrument by holding a charged dielectric rod near it. The positive charge on the rod causes the mobile charges in the brass post to separate, with negative charges being attracted into the top electrode, while positive charges are repelled into the leaves, causing them to separate. Alterations to image: Added colored plusses and minuses showing areas of charge.
日期
來源 Downloaded from Sylvanus P. Thompson (1881) Elementary Lessons in Electricity and Magnetism, MacMillan, New York, p.16, fig. 12
作者
  • Original version: Sylvanus P. Thompson
  • Derived version: Chetvorno
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Public domain - published in US prior to 1923

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這一媒體文件在美國屬於公有領域。這可用於版權過期的美國作品,通常這些作品發表於1929年1月1日之前。查看這個頁面可以獲取到更多的解釋。

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目前2008年4月30日 (三) 19:32於 2008年4月30日 (三) 19:32 版本的縮圖797 × 684(37 KB)Chetvorno{{Information |Description=Woodcut of gold leaf electroscope, showing induction of charge. Alterations to image: Added colored plusses and minuses showing areas of charge. |Source=Copied from Sylvanus P. Thompson (1881) ''Elementary Lessons in Electricit

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