Electricity for public schools and colleges (1891)
Larden, W. (Walter), b. 1855 or 6 · London : Longmans · leaf 301
force that inthis case radiate/;£w the wire.) § 2. The -f and — Directions of the Lines of Force.—It iseasily shown, by experiment with a magnetic needle, that the +and — directions of the lines of force are given by either of thefollowing rules. (I.) Amperes 7ule.—■If one szvims with the current… … OerstecPs experhnent.—The his-toric experiment of Oersted ilhis-trates well this rule of Ampere. Thefigure here given sufficiently explainsthis simple experiment. (II.) Another form of therule is often very useful. Noone who has driven in an ordi-nary (or right-handed) screwcan forget how the hand…
Electricity
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