Electrical machinery; a practical study course on installation, operation and maintenance (1921)
Annett, Fred Anzley · New York [etc.] McGraw-Hill book company · leaf 40
ence, the cross representscurrent flowing away from the reader. Likewise for the dot;it represents the point of the arrow. The arrow must bepointing toward the observer for the point to be seen, conse-quently, the direction of the current which it represents. The next thing to remember is the… … muitiiiitfuimm/iipimtih \\ • ——TV , . Fig. 25.—Eight-hand rule for telling direction of field about an electric conductor. the fingers will then point around the conductor in thedirection of the lines of force. The field about a wire carrying an electric current doesnot take the form of a spiral,…
Electric machinery
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