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 128
ual to the first and the two resistancesare equal. TESTING WITH GALVANOMETER. 105 If the adjustable resistance be of known valuethis method can be pursued, but a more practicalmethod is to first ascertain the constant of thegalvanometer. The Direct Deflection Method. This is thesimplest method of… … /\NVWV R Fig. 72. A known resistance R, Fig. 72, is put in circuitwith the galvanometer G, battery B and doublecontact key K. After noting the deflection, the key is depressedand the unknown resistance x thrown in circuit.The second deflection is then noted and comparedwith the first. If the…
Electric testing · Electric apparatus and appliances
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
