Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 22
es the movement of the needlesdepend? Ans. Upon the combined effect of the magnetic attraction ofthe current which tends to deflect the needles, and the torsion GALVANOMETERS 441 in the suspension fibre which tends to keep the needle at thezero position. Oues. Does the astatic galvanometer give… … Fig. 514.—Central Scientific Co. tangent galvanometer. A 9 inch brass ring is mountedon a mahogany base which rotates on a tripod provided with levelling screws. The needlehas an aluminum pointer and jewelled bearing. The winding consists of 300 turns of mag-net wire so connected to the plugs in…
Electrical engineering
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