Brechner, Claude H., 1887- [from old catalog] · Boston, New York [etc.] Allyn and Bacon · leaf 161
st be magnetized. 181. Difference between a Magnetized Piece of Iron and One Not Magnetized.—In a piece of iron that isnot magnetized the mole-cules have their N-polesand S-poles pointing invarious directions (Figure132), and the effect ofsome molecules neutral-izes the effect of others.It is like… … HOW TO MAGNETIZE A PIECE OF IRON 151 which is magnetized, the molecules are all in order; so thatall the S-poles point to one end, and all the N-poles to theother. (Figure 134.) In this case the effect of each molecule helps the effect ofevery other, and one end of the bar becomes a N-pole andthe…
Physics
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