Electromagnet

Electromagnet used by James Joule in about 1839 for experiments on the attracting power of magnets. Iron bar is wound with '88 yards of covered copper wire 1/16" diameter.' One of a pair of magnets used to test the law that 'the attractive force of two electromagnets is directly proportional to the square of the electric force to which the iron is exposed', i.e. M (attraction) = E squared (electric current) x W squared (length of wire). Results showed that as the length of the bar is increased, so the power of attraction increases.

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Electromagnet Type E

Ophthalmic electromagnet, United Kingdom, c. 1940

Horseshoe-shaped electromagnet used by James Joule

Horseshoe electromagnet, probably home-made

F-Quadrapole electromagnet from the storage ring of the Synchrotron Radiation Laboratory

Electromagnet Core

Electromagnet used by James Jo

Electromagnet Core

Electromagnet and rotating copper disc

Part of Electromagnet

Electromagnet Core

Electromagnet for a crane, by Witton Kramer

Electromagnet made by James Joule for experiments on lifting power

Replica of James Joule's Electromagnet

Cased electromagnet

Superconducting Electromagnet, 1990

Electromagnet Core

Part of Electromagnet

Small superconducting electromagnet

Part of Electromagnet

Ferranti electromagnet

Ferranti electromagnet

Large electromagnet with one armature and two pole pieces

Part of Electromagnet

Newport type N38 electromagnet

Wiggler Electromagnet and Part of Support Stand from the Storage Ring of the Synchrotron Radiation Laboratory

Newport type N38 electromagnet, with power supply and power lead

"Nivoc" electromagnet by W. and J. George and Becker Ltd.

Superconducting electromagnet

Large electromagnet by Ducretet

Electromagnet used by James Joule in about 1839 for experiments on the attracting power of magnets

Electromagnet used by James Joule

Model of Mullard 'Ticonal' permanent magnet assembly

Electromagnet originally used for magnetising compass needles

Large electromagnet by Nalder Bros. and Co

Electromagnet and keeper

Electro-magnet horseshoe form

Large superconducting electromagnet

Electromagnet used by James Joule

Large electromagnet

Ferranti,electromagnet

Switch panel for electromagnet originally used for magnetising compass needles

Large electromagnet by Nalder Bros. and Co

Large electromagnet by Ducretet

Electromagnet originally used for magnetising compass needles