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 178
-Hand Rule for Direc-tion of Whirls.—If the Directionof Current in any Circuit is Known,the Direction of the Circular Magnetic Field Around theWire May be Found as Follows: Place the palm of the outstretched right hand above the voire,with the fingers pointing in the direction of the current, and…
Electricity · Magnetism
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer01inte-95-21.webp)
