Text-book of general physics, for the use of colleges and scientific schools (1899)
Hastings, Charles Sheldon · Boston: Ginn & company · leaf 426
ethe current is calculated from the tan-gent of the angle of deflection, consistsof a short needle suspended at the cen-ter, or on the axis, of one or more coilsof wire exactly circular in form (Fig.256). The ends of the coils to which connection is madeare brought close together, and bent at right… … Fig. 256. 416 GAL VAXOME TBY. set parallel to the magnetic meridian. A being toward thenorth. Also suppose that the current is traversing the coilin such direction that the northf>ole, m, of the needle is urged tothe right, and the south pole. m.to the left. Let B = radius of the coil. i =…
Physics
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten10unit-553-372.webp)