Laboratory exercises in physics for secondary schools (1906)
Twiss, George Ransom, b. 1863 · Chicago, Scott, Foresman and company · leaf 165
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 AOand CD (i.e. —3 L maybe substituted for the ratio of their resistances f -3 j anc{ we shall have • h If three of the quantities in… … Fig. 31. 144 LABORATORY EXERCISES IN PHYSICS resistances are negligible unless extreme accuracy issought. The straight wire Z3 Z4 is just a meter(sometimes a half meter) long, and as nearly asmay be of uniform cross section. It is made of analloy (German silver or platinoid) which has a rela-tively…
Physics
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