Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 24
W». 13* ^ss^ ,^„„,^,.,, „ . .,.,„..„.;.;;::.;iv:v^^^ Fig. 1. Field of Force about a BarMagnet … 2. Field of Force about a SinglePole Let the unit of length be the centimeter, and the unit of force thedyne; then a unit pole may be defined as one which exerts a forceof one dyne on a similar pole at a distance of one centimeter. Thestrength of any pole or quantity of magnetism is, therefore,…
Electrical engineering
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