Brechner, Claude H., 1887- [from old catalog] · Boston, New York [etc.] Allyn and Bacon · leaf 198
Figure 189. — Photograph of a Voltmeter with the Cover Removed. THE VOLTMETER 187 When the galvanometer has its scale graduated in amperes,it is called an ammeter. Its principle is just the same as thegalvanometer, but reads directly in amperes. The resistance of the coil in an ammeter is wry low,… … Figure 190.—The Permanent Magnet, Coil, and Pointer of aD. C. Voltmeter. (D. C. meter) and a suspended coil. The scale of the volt-meter is graduated to read directly in volts. 188 MOTION-PRODUCING EFFECT OF CURRENT The resistance of the voltmeter is made very high; so itshould be placed across,…
Physics
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