Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 74
ion of cur-rent underneath the needle as ahove it, the deflection is opposite to what it previously w^as. Nowbend the wire around the needle, at rest, parallel to it, so that the cur-rent flows over tlie needle and under the needle in opposite directions.The deflection is now in the same direction,… … Fig. 74. -Simple Detector Galvanometer.
Electricity · Magnetism
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