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 187
Battery Fig. 152.—Simple Galvanometer. 168 PRACTICAL ELECTRICITY. … Fig. 153.—Students DetectorGalvanometer. side towards which the N-pole of the needle moves, ^[ 168.The strength of current is indicated by the amount of theneedles deflection; since the position the needle takes updepends upon the relative magnitude of the magnetic forces, due to the current and…
Electricity · Magnetism
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