. Electricity simplified. The practice and theory of electricity ... ryvelocity, showing a very pretty figure by the reflec-tion of light from its bright surface. The same maybe shown by a piece of string with a ring or even abutton strung upon it. If such is stretched betweenthe two hands, the same representation can be pro-duced. All this, of course, is merely a crude pictorial 78 ELECTRICITY SIMPLIFIED. representation or model of the supposed constitutionof one of the whirls of an electromagnetic line offorce. The direction and polarity of the lines of an actualmagnetic field are easily stu
. Electricity simplified. The practice and theory of electricity ... ryvelocity, showing a very pretty figure by the reflec-tion of light from its bright surface. The same maybe shown by a piece of string with a ring or even abutton strung upon it. If such is stretched betweenthe two hands, the same representation can be pro-duced. All this, of course, is merely a crude pictorial 78 ELECTRICITY SIMPLIFIED. representation or model of the supposed constitutionof one of the whirls of an electromagnetic line offorce. The direction and polarity of the lines of an actualmagnetic field are easily studied. Without detractingfrom Faradays unparalleled genius and work in thisfield, the ease with which electromagnetic lines offorce can be mapped out and investigated conducedlargely to the success of his investigations. Lines of force are studied most easily by the useof iron filings. These tend to arrange themselvesparallel to and as nearly as possible in the axis ofthe lines. The field of force around a magnet isshown by placing a piece of paper over it, dusting. Fig. 13.—Electromagnetic Lines of Force Shown by Iron Filings. ILLUSTRATIONS OF LINES OF FORCE. 79 iron filings upon the paper, and tapping it. Thefilings take a symmetrical position, and show thatlines of force connect the opposite poles of themagnet. An example of this experiment is shown inthe first cut, and the diagrammatical representationin the next cut. >>A\W////:::::::x\\\\i///
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Keywords: ., bookcentury1800, bookdecade1890, bookidel, booksubjectelectricity
