Electricity for public schools and colleges . (ii.) Next we may remove r, and have in the circuit only a tangent gal-vanometer of practically no resistance. The results of (IL) above may thus be verified. § 7. Graphic Representation of Ohms Law.—By a graphicmethod, familiar to those who are acquainted with the elementsof co-ordinate geometry, and capable of being understood also bythose of less mathematical knowledge, we may represent to theeye in one view (i.) the difference of potential between two pointsA and B in a circuit; (ii.) theresistance between A and B ;(iii.) the current which flow
Electricity for public schools and colleges . (ii.) Next we may remove r, and have in the circuit only a tangent gal-vanometer of practically no resistance. The results of (IL) above may thus be verified. § 7. Graphic Representation of Ohms Law.—By a graphicmethod, familiar to those who are acquainted with the elementsof co-ordinate geometry, and capable of being understood also bythose of less mathematical knowledge, we may represent to theeye in one view (i.) the difference of potential between two pointsA and B in a circuit; (ii.) theresistance between A and B ;(iii.) the current which flowsthrough this resistance onaccount of this difference ofpotential. Let distances measuredalong the line O r representby their length the magni-tude of the resistances. Ifthe wire be uniform, then equal lengths of wire will be represented by equal lengths alongO r. If the conductor be not uniform, this will not be the metre of a very thick good conductor may be practically a
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Keywords: ., bookcentury1800, bookdecade1890, bookpubl, booksubjectelectricity
