Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 71
s the current flowing in amperes as read from the ammeter. If the readings of the voltmeter be correct to T-J-ff and the ammeter read-ings be correct to the same degree, the possible error becomes : 100 x (iniU+ tsrt) = Per cent- measurement of Very Small Resistances with a HEillivolt-meter and… … Fig. 46. In order to have a reasonable degree of accuracy in measuring resistanceby the drop method, as this is called, it is necessary that as heavy cur-rents as may be available be used. Then, if E be the dynamo or other sourceof steady E.M.F., X be the required resistance of a portion of the…
Electrical engineering
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