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 359
Fi-. 309.—Students Experimental Dynamoand Motor. oO … Fig. 310.- -Graphical Eepresentation of anAlternating Current. sen ting intervals of time. The vertical line, AM, at rightangles to it is divided into distances representing units ofcurrent, the current being in a positive direction when indi-cated above PK, and negative, when below PK. When the…
Electricity · Magnetism
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
