படிமம்:Sturgeon electromagnet.png

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விளக்கம்Sturgeon electromagnet.png	English: Drawing of the first electromagnet, invented in 1824 by British scientist William Sturgeon. This was his original drawing from his 1824 paper to the British Royal Society of Arts, Manufactures, and Commerce. It was made of 18 turns of bare copper wire (insulated wire had not been invented) on a U-shaped lacquered iron core about 1 ft (30 cm) long and 1/2 inch (13 mm) diameter. When the wires were connected to a single cell copper-zinc-acid battery, the electromagnet could support 9 pounds. The little cups contain mercury and were an early method of making an electrical contact between wires. The one on the left acts as a power switch. Alterations to image: converted from JPG to 32color PNG. (Detailed information is from Sylvanus P. Thompson (1891) Lectures on the Electromagnet, W.J. Johnson Co., New York, p.17-19)
நாள்	1824
மூலம்	Downloaded August 9, 2008 from Joseph Henry's contributions to the Electromagnet, Smithsonian Institution Archives, neg. no. 46,761-D, where it is credited to Sturgeon, W. (1824) 'Improved Electro Magnetic Apparatus', Trans. Royal Society of Arts, Manufactures, and Commerce, Vol.43, Plate 3, fig.13.
ஆசிரியர்	William Sturgeon
அனுமதி (இக்கோப்பை மீண்டும் பயன்படுத்துதல்)	Public domain - Author died 1850

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	நாள்/நேரம்	நகம் அளவு சிறுபடம்	அளவுகள்	பயனர்	கருத்து
தற்போதைய	21:24, 9 ஆகத்து 2008		422 × 600 (32 KB)	wikimediacommons>Chetvorno	{{Information \|Description={{en\|Drawing of first Wikipedia:electromagnet invented in 1824 by British scientist William Sturgeon. It was made of 18 turns of copper wire on an iron core. This is Sturgeon's original drawing from his paper to the Britis

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