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A text-book of physics, largely experimental. On the Harvard college "Descriptive list of elementary physical experiments." (1891)

Hall, Edwin Herbert, 1855-1938, Bergen, Joseph Y. (Joseph Young), 1851-1917 · New York, H. Holt and Company · leaf 517

An illustration from A text-book of physics, largely experimental. On the Harvard college "Descriptive list of elementary physical experiments.", 1891, leaf 517 — . 28 wire fromthe circuit, and put in its place thetwo spools of No. 30 wire joined,in parallel, or multiple, as in Fig.266, so that the current, as indi-cated by the arrow-heads, will bedivided equally between them.With this arrangement make ob-servations as in the preceding case,taking finally… … Fig. 266. ranged. PROBLEMS. (1) If the resistance of 45 m. of copper wire 1 sq. mm. in cross-section is 1 ohm, what is the resistance of 90 m. of like wire 4 sq.mm. in cross-section? (2) If the resistance of 2.5 m. of G.-s. wire 3 sq. mm. in cross-section is 0.4 ohm, what is the resistance of 10 m.…

Physics

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