Gage, Alfred P. (Alfred Payson), 1836-1903 · Boston, London, Ginn · leaf 527
erous methodsdepending on Ohms law that have been devised for deducing batteryresistance are of little value in many cases. The method known as Mances method is one of the best formeasuring battery resistance, since it requires the battery to beconstant only during the short time the key is closed.… … ELECTRO-MOTIVE POECB OF DIFFERENT CELLS. 507 in which r is the battery resistance, R is the resistance in the re-sistance box; a and 6 are the resistances respectively in the armsA 6and AD. Ha = 6, the for-mula is siipplifled, and becomesj- = R. The information generally re-quired in practice,…
Physics
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