Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1903)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 223
al springs,against which the coilacts when it tends torotate, the springs serv-ing to also conduct thecurrent to and from thecoil. A thin aluminumknife-edge pointer at-tached to the bobbin andswinging over the scale,Fig. 195, indicates theangle of deflection of thecoil. This coil is… … AMMETERS. 205 etc., have been cut away. When a current is sent throughit, by the springs, the coil tends to move through themagnetic field, to take up a position so that its lines of forcewill be in the same direction as those of the field. Itwill so move until the torsion of the springs is…
Electricity · Magnetism
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