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 161
Dynamo. By Formula (44) nq — ,=- K 40 =5 electromagnets. 3 OHM 3 R=n40 ohms, J. K. — 8 ohms. 156. Unequal Resistances in Parallel.—In Fig. 118, twounequal resistances, 8 and 7 ohms respectively, are connected in parallel. The joint re-sistance will be less thaneither resistance… … 118.—The Joint Resistance ofTwo Unequal Resistancesin Parallel. CIRCUITS AND THEIR RESISTANCE. 143 Then the joint conductivity = ^ -J- ^- = v* %iho8, and the joint resistance = 1 -*- J*i-±^=^A0hms, K X r(j K -f- Kj or J. R. = ^*Ri (46). R -f-R1 Prob. 58: Find the joint resistance of two coils in…
Electricity · Magnetism
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