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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
BIRRC-P0245b.JPG

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.
The mounting is more recent for display purposes; date unknown.
Made by Miachel Faraday or an assistant.

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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