Electrical machinery; a practical study course on installation, operation and maintenance (1921)
Annett, Fred Anzley · New York [etc.] McGraw-Hill book company · leaf 133
ue and close the battery and then thegalvanometer key. If this is too low, try a higher value; ifthis is too great, try a value between the two, until thebridge is approximately balanced. It is generally not pos-sible to get an exact balance, but two values can be obtained,one giving a slight… … Fig. 130.—Wheatstono l)ii(ljjo diajfram. In Fig. 130 if the Wheatstone bridge is balanced under the conditionsshown, find the value of the unknown resistance R.RiRi ^72X\,510 Ri 211 The value of ft = = 515 ohms. CHAPTER IXCALCULATING SIZE OF CONDUCTORS Wire Gag-e for Round Wire.—The gage chiefly…
Electric machinery
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