Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 287
otor. If a horse-shoe magnet he held over a compass the needle will take a posi-tion parallel to the lines of force which flow from one pole to the other.It is perfectly obvious that if the magnet he rotated the needle will follow. If a four-pole electromagnet he substituted for the horse-shoe, and…
Electrical engineering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
