Electricity and magnetism : an elementary text-book, theoretical and practical (1920)
Glazebrook, Richard, Sir, 1854-1935 · Cambridge : The University press · leaf 373
in the field. By properly choosing the formof the magnet this can be arranged so that the deflexion isvery accurately proportional to the current; in such aninstrument the current causing a given deflexion is read o£fdirectly. 220-221] ELECTROMAGNETIC INSTRUMENTS 363 In another form of the… … Fig. 226. 221. Soft iron Ammeters. In another class ofinstruments the attraction between a coil carrying a currentand a piece of soft iron is used to measure the current. Apiece of soft iron is arranged so that it can be sucked up intothe core of the coil when the current passes; the distancethe…
Electricity · Magnetism
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