Advanced theory of electricity and magnetism; A text-book for colleges and technical schools (1915)
Franklin, William S. (William Suddards), 1863-1930, MacNutt, Barry, 1878-1936. joint author · New York, Macmillan · leaf 33
as shownin Fig. 17. The suspended magnetcarries a pointer which plays over adivided circle by means of which onemay observe the angle <t> throughwhich the suspended magnet is turnedwhen a current I is sent throughthe coil. The coil is mounted withits plane vertical and magnetic northand south… … Fig. 17.Circular coil of two turnswith small magnet suspendedat its center. 1 W~\ |&|- section of coil suspended magnet
Electricity · Magnetism
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