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voltmeter

voltmeter, instrument used to measure differences of electric potential, commonly called voltage, in volts or units that are multiples or fractions of volts. A voltmeter is usually combined with an ammeter and an ohmmeter in a multipurpose instrument. Most voltmeters are based on the d'Arsonval galvanometer and are of the analog type, i.e., they give voltage readings that can vary over a continuous range as indicated by a scale and pointer. However, digital voltmeters, which provide voltage readings that are composed of a group of digits, are becoming increasingly common. Since an oscilloscope is capable of giving a calibrated visual indication of voltage, it can be called a voltmeter. See also potentiometer.

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voltmeter

voltmeter Instrument for measuring the voltage (potential difference) between two points in an electrical circuit. Voltmeters are always connected in parallel with the components whose voltages are being measured. A voltmeter has a high internal resistance compared with the resistance across which it is connected. See also ammeter

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voltmeter

volt·me·ter / ˈvōltˌmētər/ • n. an instrument for measuring electric potential in volts.

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