File:Electromagnetic Measurements Lord Kelvins Ampere Balance.png

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Electromagnetic_Measurements_Lord_Kelvins_Ampere_Balance.png(800 × 440 pixels, file size: 134 KB, MIME type: image/png)

A 1911 photo of Lord Kelvin's Ampere balance - an electromechanical apparatus used for the precise measurement of an ampere or unit of electric currents

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current16:50, 2 March 2012Thumbnail for version as of 16:50, 2 March 2012800 × 440 (134 KB)Beichner (talk | contribs)

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