Brechner, Claude H., 1887- [from old catalog] · Boston, New York [etc.] Allyn and Bacon · leaf 200
Figure 192. — A Volt-ammeter which can be used as either a Voltmeter or an Ammeter. The metal binding posts are ammeter connections, and the rubberones are voltmeter connections. sets of coils. One set takes the place of the permanentmagnets in the ammeter, voltmeter, and galvanometer, and theother… … Load Figure 193. — Wiring Diagram of a Wattmeter. 190 MOTION-PRODUCING EFFECT OF CURRENT Since the wattmeter measures power, it must read inwatts, or volts X amperes. It is so connected (Figure 193) that the current passesthrough the field coils, measuring the current; and themovable coil is…
Physics
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