Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1903)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 178
Fig. 138.—Right-Hand Rule for Finding Direc-tion of Current or Needles Deflection. N 170. Right-HandRule for Directionof Current or De-flection of Needle. rOLE of a needle will be To FIND THE DIRECTION THEDEFLECTED BY A CURRENT : Arrange the wire above and parallel to the needle when it is at 160…
Electricity · Magnetism
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