User talk:BillC

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Tip: Categorizing images

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Hello, BillC!
Tip: Add categories to your files
Tip: Add categories to your files

Thanks a lot for contributing to the Wikimedia Commons! Here's a tip to make your uploads more useful: Why not add some categories to describe them? This will help more people to find and use them.

Here's how:

1) If you're using the UploadWizard, you can add categories to each file when you describe it. Just click "more options" for the file and add the categories which make sense:

2) You can also pick the file from your list of uploads, edit the file description page, and manually add the category code at the end of the page.

[[Category:Category name]]

For example, if you are uploading a diagram showing the orbits of comets, you add the following code:

[[Category:Astronomical diagrams]]
[[Category:Comets]]

This will make the diagram show up in the categories "Astronomical diagrams" and "Comets".

When picking categories, try to choose a specific category ("Astronomical diagrams") over a generic one ("Illustrations").

Thanks again for your uploads! More information about categorization can be found in Commons:Categories, and don't hesitate to leave a note on the help desk.

BotMultichillT 08:25, 7 September 2009 (UTC)[reply]

A question regarding your picture File:Transformer_under_load.svg

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Hi, I'd like to make some modifications to your picture (outlined above), because some languages use different symbolics to denote values (especially voltage and current). There's one symbol I'm not quite familiar with: E (Ep and Es respectively). Could you explain what do those mean please? -- CoolKoon (talk) 23:15, 29 November 2014 (UTC)[reply]

Wow, it shows how long it's been since I've been here to not see your message until now. To answer it, the E stands for Electromotive Force, which is simply the voltage produced by a source such as a battery, generator, or as in this case, the voltage generated by the changing magnetic field of a transformer winding. BillC (talk) 11:16, 5 September 2015 (UTC)[reply]
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