Electric transmission of energy and its transformation, subdivision, and distribution. A practical handbook (1894)
Kapp, Gisbert, 1852-1922 · New York, Van Nostrand · leaf 56
ance ; and the direc-tion of which is at right angles to the plane passingthrough the element and through the magnet pole. The ABSOLUTE MEASUREMENTS. 41 force due to the element, d 7, situate at ft, is therefore m C dl 771 f, and its amount is d F = -^- -—■ The horizontal ■ + r2 component of this… … If the magnet pole lies in the centre of the coil, d = o,and the force is evidently H = ——-— . This equation provides another definition for unitcurrent. It will be seen that if m, r and c are equal tounity, H is equal to 2 7r, and we may define unit currentas that current which, flowing i7i a wire…
Electric power production
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