The book Elementary Text-Book of Physics was written by author Anthony, William A. (William Arnold), 1835-1903 Here you can read free online of Elementary Text-Book of Physics book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Elementary Text-Book of Physics a good or bad book?
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The iron almost wholly loses these properties when removed from the magnet. The steel retains them and itself becomes a magnet. The reason for this differ- ence is not known. It is usually said to be due to a coercive force in the steel. The attractive power of the original magnet for other iron or steel remains unimpaired by the formation of new magnets. A body which is thus magnetized or which has its mag- netic condition disturbed is said to be affected by magnetic induction. 224 ELEMENTARY ...PHYSICS. [178 In an ordinary bar magnet there are two small regions, near the ends of the bar, at which the attractive powers of the mag- net are most strongly manifested. These regions are called i\\& poles of the magnet. The line joining two points in these regions, the location of which will hereafter be more closely defined, is called the magnetic axis. An imaginary plane drawn normal to the axis at its middle point is called the equatorial plane. If the magnet be balanced so as to turn freely in a horizon- tal plane, the axis assumes a direction which is approximately north and south.
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