Laboratory exercises in physics for secondary schools (1902)
Twiss, George Ransom, b. 1863 · New York, London, The Macmillan company · leaf 147
al and sectional area are propor-tional to their lengths, it follows that if ACD be awire of uniform material and thickness, the ratio of the lengths of the segments A0and CD (i.e. —3 j, maybe substituted for the ratio of their resistances (^ ) an(j r L * . we shall have -1 = —%. If three of the… … Fig. 31a.—Wheatstones Slide-wire Bridge. stone slide-wire bridge, shown in Fig. 31 a and b ;one or two cells of battery Ba, in series ; the wires MAGNETISM AND ELECTRICITY 119 whose resistances and dimensions are to be deter-mined, and a known resistance, to be used as a stand-ard. Two pairs of…
Physics
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