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ID number: BIRRC-P0245 Institution: Research and Cultural Collections Named collection: Historic Physics Collection Artist / Maker: Faraday, Michael Title / Object name: Faraday's Coil Object type: Inductor Place made: Royal Institution, London Date made: Assumed 1830s Materials: Cotton-covered iron wire wrapped in paper and held by thread and sealing wax. Mounted on a wooden peg on a wooden base with velvet covering and all covered with a glass dome. Measurements: Coil: diameter 1.7 cm length 2.7 cm Overall: diameter 13 cm, height 8 cm |
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This coil is typical of those held at the Royal Institution where Faraday discovered the process of electromagnetic induction in 1831, but the inscription makes this coil unusual as it is wound to have no inductance. It could have been made to test out Faraday’s ideas, but we have found no record of it in Faraday’s extensive diaries of the time. Inscriptions / Translations: In handwriting on the coil: Iron wire 25 feet. wire double: helix double therefore inactive Label on base: Faraday’s Coil |
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