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 62
tery be substituted therefore. Witb the connections as in Fig. 29, close the switch S, and take the dropwith the voltmeter from a to b and the drop from a to C; then disconnect MEASUREMENT OF MUTUAL INDUCTANCE. 49 the A. C. dynamo, and connect the battery B ; open the switch s, and varythe… … from a to b with the voltmeter. Call the drop across JRt from a to b, withalternating current, E, ami the same with continuous current, Ex, and thereading of the ammeter with the latter, i. Then L = - =-±- , 2lT?lI If the resistance Bx be known, and the ammeter be suitable for use withalternating…
Electrical engineering
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