Lessons in practical electricity; principles, experiments, and arithmetical problems; over four hundred illustrations; an elementary text book (1909)
Swoope, C. Walton (Coates Walton), d. 1901 · New York, D. Van Nostrand company · leaf 187
eneedle before itmoves at all. Whenthe needle is deflect-ed to 90 degrees,or at right anglesto the wire, it is inthe maximumposition of the cur-rents field. Thevalue of the deflec-tion is dependentupon the currentflowing through thecoil, but is not pro-portional to the current; that is, if one… … Fig. 154. -Construction of Students DetectorGalvanometer.
Electricity · Magnetism
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