Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 178
138.—Right-Hand Eule for Finding Direction of Current or Needles Deflection. THE N 170. Right-HandRule for Directionof Current or De-flection of Needle. pole of a NEEDLE WILL BE To FIND THE DIRECTIONDEFLECTED BY A CURRENT : Arrange the wire above and parallel to the needle when it is at 160…
Electricity · Magnetism
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