Cyclopedia of applied electricity : a practical guide for electricians, mechanics, engineers, students, telegraph and telephone operators, and all others interested in electricity (1905)
American School (Chicago, Ill.) · Chicago : American School of Correspondence · leaf 74
60 ELEMENTS OF ELECTKIdTY. 53 There are three general methods of constructing lines, namely,the grounded circuit, the metallic circuit, and the common return.In the common return the circuit is completed through a copperwire instead of through the ground as in the grounded system,thus eliminating… … ^7- cu ui->O o ua>u oo CO E C Q (U c 9 H e u ■M w> a>Q / THE ELECTRIC CURRENT. Electromotive Force. When a difference of electrical poten-tial exists between two points, there is said to exist an electro^motive force ^ or tendency to cause a current to flow from one pointto the otlier.…
Electrical engineering
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