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 74
rection of cur-rent underneath the needleas above it, the deflection is opposite to what it previously was. Xowbend the wire around the needle, at rest, parallel to it, so that the cur-rent flows over the needle and under the needle in opposite directions.The deflection is now in the same… … Fig. 74.—Simple Detector Galvanometer. 56 PRACTICAL ELECTRICITY.
Electricity · Magnetism
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