Practical electricity .. with questions and answers (1911)
Cleveland armature works, [from old catalog] comp, Lincoln, John C. [from old catalog] · [Cleveland, Ohio, Cleveland armature works] · leaf 220
e current, for the flux is constant throughoutthe whole air gap. It is also true that the counter-forceexerted by the two hair springs is proportional to the move- 209 ment of the bobbin; therefore twice as much current inthe wires on the bobbin will produce twice as much move-ment of the pointer… … Figure 72Connection of Weston ammeter. Current is brought into the instrument through thebinding j>osts A and C, but, before passing through the wireon the bobbin, the current must traverse the very high re-sistance R; this resistance is from 65,000 to 75,000 ohms fora volt meter intended for a…
Electricity
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