Lessons in practical electricity; principles, experiments, and arithmetical problems; over four hundred illustrations; an elementary text book (1909)
Swoope, C. Walton (Coates Walton), d. 1901 · New York, D. Van Nostrand company · leaf 123
of No. 24 B. & S.Copper Wire. Diameter, .0201 inohCircular mil area (<l2)— .0201 x 0201=404 C. M. Ohms per 1000 feet=25.695 Feet per ohm =38.918 Ohms per pound =21.050 Pure Copper Wire, Specific Gravity 8.9. Resistance at 75° P. NO. 2. his spool is wound ^ 50 ft. of No. 24 B. & S.Copper… … NO. A. pith pool is wound v 25 ft. of No. 24B.&S.NGerman Silver Wire. Diameter, 0201 inchCircular mil area (d2)= .0201x.O201=404CM.Ohms per 1000 feet=480.834Feet per ohm — 2-°08 Ohms per pound =393.93 (18$ German Silver.) Fig. 101.—Resistance Spool Set, Exp. 37: Connect spool 2 in place of1,…
Electricity · Magnetism
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