Tunzelmann, George William von, 1856- · New York, Scribner & Welford · leaf 67
54 ELECTRICITY IN MODERN LIFE. a series of circles, having this hole as their common centre,as shown in Fig. 4. The level surfaces, being perpendicular … 1^ .■■:...,i,:M^,mm-.:^.f,.^^^0,^m Fig. 4. to the lines of force, evidently consist, in this case, of a seriesof planes passing through the straight wire. In the case of the field of gravitation force in which acomet was moving, considered at the beginning of thechapter, the direction of the force…
Electric industries · Electricity
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