Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 249
d assuming the left poleto be north or -f-. and the armature tobe revolving counter clock-wise, then thecurrent is flowing to the right across the faceof the armature, or the left brush is positive,or the terminal from which current willflow, returning by the negative or right-handbrush. Reversing… … Knowing the direction of current in the circuit, or which is the posi-tive and which the negative terminals of the circuit, the direction of rota-tion of the armature can easiest be determinedby use of the accompanying diagram (Fig. 12),which is called Flemings left-hand rule. field magnets. In the…
Electrical engineering
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