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 173
eachother, but complete their cir-cuits independently aroundthe wire. ^^ ■ ^ 167. Direction of the ^^S- 130.-Current Flowing Up-Whirl8_ . r. -n If Anti Clockwise. Lines of Force of a Q+v»<iirr1-i+ f*^^^vv>tx•n^ OctvY-tr The coinpass needles ou the horizontal card-Otralg^Jll) V/Urrenu-vdrry-… … ELECTROMA GNETISM. 155 ^. /: around the wire in the form of a circle, Fig. 130, of such diameterthat all the needles point nearly N and S. Pass a strong currentthrough the wire from a batterj^ so that the current flows up, or to-ward you as you look down upon the cardboard. When the current flows…
Electricity · Magnetism
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