Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 161
Formula (44) T p =-7r =5 electromagnets. J. Iv. o nqR=:40 ohms, J R. = 8 ohms. 3 OHMS 156. Unequal Resistances in Parallel.—In Fig. 118, twounequal resistances, 3 and 7 ohms respectively, are connected in parallel. The joint re-sistance will be less thaneither resistance consideredseparately. To… … Fig. 118.—The Joint Resistance of Two Unequal Resistances in Parallel. CIRCUITS AXD THEIR RESISTANCE. 143 Then the joint conductivity = ^ -f ^ =: ^ ~^ mhos, \x xij K X -tvi and the joint resistance =:= 1 ^Ji+^^l-Kgiohms, K X ivj K -|- Kj or J. R.^g^^A (46). Prob. 58: Find the joint resistance of…
Electricity · Magnetism
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