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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 75

An illustration from Electrical instruments and testing; how to use the voltmeter, ohmmeter, ammeter, potentiometer, galvanometer, the Wheatstone bridge, and standard portable testing sets, 1907, leaf 75
resistance. A multiplierwith a value of 10, for instance, used with a 6 voltvoltmeter of 521 ohms would measure about 5215ohms; one with a value of 40 wrould equal about20,860 ohms. The multiplier by 10 would give atotal scale value of 60 and the multiplier by 40, atotal scale value of 240 volts to… … Fig. 39. Millivolt and Milliampere Instruments. The prefix milli means one thousandth, a millivolt isan e.m.f. of one thousandth of a volt, a milam-pere or milliampere, one thousandth of an ampere.Instruments of which the total scale reading isabout one volt or one ampere, and those in whicheach…

Electric testing · Electric apparatus and appliances

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