Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
s this direction becausein no other position would the currents pass at right angles to themagnetic meridian of the earth (769). The solenoid, therefore, simulates, in all respects, the character of amagnetic needle, although possessing not a particle of iron or steel inits composition. If another… … 772. Figure 65.—Magnetizing by the helix and elec-trical current.—If a bar of iron or steel be placed within a helixof wire, as shown, and an electric current passed over the wire, the barinstantly becomes a magnet. If the bar is soft y\g. 55. iron it loses its magnetism the instant the cur-rent is…
Physics · Astronomy
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