Gerard, Eric Mary, 1856-1916 · New York W.J. Johnston · leaf 231
tial position by turning theupper part of the suspension wire. The angle of torsionenables us to measure the deflecting current, the terrestrialcouple being zero. The angle of torsion ft is proportional to the square ofthe current through the two solenoids, or ft = ki\ 153. Case of a Ring-shaped… … Fig. 74. by a current, is zero in all external points. The internalflux of force created by the system is composed of lines offorce concentric with the ring. This system is equivalent 216 ELEC TROMA GNE TISM. to a magnet formed of magnetic filaments closed on them-selves. The field is variable in a…
Electricity · Magnetism
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer02inte-159-67.webp)
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer01inte-385-144.webp)
