Dynamos and motors; a text book for colleges and technical schools (1911)
Franklin, William S. (William Suddards), 1863-1930, Esty, William, 1868-1928 · New York The Macmillan company · leaf 39
g solenoid. — Consider a coil of wire wound in a thin layer on a longcylindrical rod of non-magnetic material, wood, for example. Let r be the mean radius of the windings, / the length of thecoil, and Z the number of turns of wire. Thefield intensity in the coil is cY=47rZ///,* andthe area of the… … 47r2;-2Z2 (I8) in which the inductance I. is expressed inabhenrys. To reduce to henrys, the right-Pig. 7, hand member of equation (i8) must be dividedby lo^.Case II. Coil wound on an iron core. —A coil of Z turns of wire is wound onan iron ring / centimeters in circumference (mean), and s square…
Dynamos · Electric motors
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