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 206
ractive force may be weighed by arranging the core uponone end of a balance arm, with the solenoid directly below it,and placing weights in the scale pan to balance the force ofthe currents field upon the iron. While balanced, as inFig. 175, test the polarity of the bar by a compass, and it… … Soft Iron Uciyht which is consequently S-polarity (S where lines enter), theyemanate from the lower or N-end and pass through the coil.Place the solenoid nearer to the core, or lower the core to it,and the pull isconsiderably in-creased, as notedby the additionalweights required tobe added to…
Electricity · Magnetism
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Diagrams of natural philosophy / James Reynolds]. (1850)](https://img.insideoutlibrary.com/img/200/wellcome-wellcome_b28750561-51-6.webp)
