Meters The more common electric meters may be roughly divided into the following classes: According to the function performed, as: I . Ammeters, 2. Voltmeters, 3. Wattmeters. According to the circuit on which they are used, as: 1. Alternating current, 2. Direct current. According to the principle of operation, as: I. Permanent-magnet, moving-coil, 2. Dynamometer, […]
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