An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 116
Fig. 49. Loose solenoid with its linesof force. rent near it depends upon the strength of the current. We now see that when a current is coiled around a point, the force depends upon the strength of the current multiplied by the number of turns in the coil. This product of the current by the turns… … Fig. 50. — Iron filings showing the magnet-ism inside and outside of a solenoid. gether so that they belong to the coil or windings as a whole(Fig. 49). Such coils are often called solenoids, and, when acurrent is passed through them, they exhibit all the magneticeffects which are shown by steel…
Electricity · Magnetism
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