Permeameter
3148706
153451309
2007-08-24T23:47:33Z
Squids and Chips
2947772
stub sort
The '''permeameter''' is an instrument for rapidly measuring the [[electromagnetic]] [[permeability (electromagnetism)|permeability]] of samples of [[iron]] or [[steel]] with sufficient accuracy for many commercial purposes. The name was first applied by S.P. Thompson to an apparatus devised by himself in [[1890]], which indicates the mechanical [[force]] required to detach one end of the sample, arranged as the core of a straight [[electromagnet]], from an iron [[yoke]] of special form; when this force is known, the permeability can be easily calculated.
{{1911}}
{{electromagnetism-stub}}