Illustrations that I have added to Wikimedia Commons and inserted in some articles:
Illustration of the electric field surrounding a positive (red) and a negative (green) charge (click for larger image). I inserted this illustration in the Electric field article.
Illustration of the electric field surrounding two equal charges (click for larger image).
Illustration of the electric field surrounding one positive charge (click for larger image). I'm not quite satisfied with this one, but I don't see any article where it would be obvious to use, so I won't improve it just now.
Any article with more than three headings automatically gets a table of contents (TOC). The TOC is placed above the first section heading. All text above the first section heading is commonly referred to as the lead section. Depending on the overall length of the article, this introduction should not exceed one to four paragraphs in length and should summarize the article's key points.
If you do not like the TOC placement in an article, you can move it by inserting __TOC__ where you would like it placed. If you do not want a TOC on a particular page, add the text __NOTOC__ anywhere on the page; if you, personally, do not like the TOC feature, you can disable it in your user preferences.
Illustration of the electric field surrounding a positive (red) and a negative (green) charge (click for larger image). I inserted this illustration in the Electric field article.
Illustration of the electric field surrounding two equal charges (click for larger image).
Illustration of the electric field surrounding one positive charge (click for larger image). I'm not quite satisfied with this one, but I don't see any article where it would be obvious to use, so I won't improve it just now.
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