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 344
iron core, and this alternat-ing flux induces an E.M.F. in the secondary coil in direct proportion to theratio of the number of turns of the primary and secondary. Technically, the primary is the coil upon which the E.M.F. from the lineor source of supply is impressed, and the secondary is the coil… … pv. fi 1 1 pJs f SjP ? ( If Si VM FlG. 1. Cores of some American Transformers.p = primary winding ; s = secondary winding. In those showing a double magnetic circuit the iron is built up throughand around the coils, and they are usually called the Shell type of trans-former. 331 332 THE STATIC…
Electrical engineering
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