Lessons in practical electricity; principles, experiments, and arithmetical problems; over four hundred illustrations; an elementary text book (1909)
Swoope, C. Walton (Coates Walton), d. 1901 · New York, D. Van Nostrand company · leaf 184
nt in the direction of the cur-rent. If on viewing theend of a solenoid thecurrent flows aroundthat end, in the samedirection that t li eh a n d s of a watchmove, Fig 150, thatend is S-polarity. Ifthe c u r r e n t flowsaround the coil againstthe direction in whichthe hands of a watch move, that… … Fig. 149.—Bight-Hand Rule for the Polarityof a Solenoid. Exp. 54: Cut a piece of cardboardto fit around a solenoid, as in Fig. 151.Place the cardboard horizontally bothat its plane is in the axis of the coil.Pass a current through the coil, andwhile gently tapping the cardboardsift iron filings on…
Electricity · Magnetism
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