International Library of Technology · Scranton, International Textbook Co. · leaf 177
lvanometer is put is measuring the magnetic qualitiesof iron. Samples of the iron to be tested, usually in the form of aring, are wound throughout their length with insulatedwire, so that if a steady current be sent through the wirethe ring will be magnetized. If a second coil of wire bewound for a… … Fig. 990. the iron ring, P P^ the primary or magnetizing coil, 5 5 thesecondary or induction coil. If the coil S S be closed through a circuit of fixed resist-ance^ the number of coulombs of electricity that will flow inthis secondary circuit zvhen the number of lines of force pass-ing through that…
Electrical engineering
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