Electrical instruments and testing; how to use the voltmeter, ohmmeter, ammeter, potentiometer, galvanometer, the Wheatstone bridge, and standard portable testing sets (1907)
Schneider, Norman H. (Norman Hugh), Hargrave, Jesse · New York, Spon & Chamberlain; [etc., etc.] · leaf 84
rmature to be attracted more or lessagainst a restraining force. The latter may begravity or springs. VOLTMETERS AND AMMETERS. 61 A pointer attached to the armature indicateson a dial. A simpler solenoidal instrument is shown in Fig.47 but acts in the same manner. A type of magnetic vane…
Electric testing · Electric apparatus and appliances
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