A ____________ is an instrument used to measure the wattage consumed by an electric motor or an electric device.

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Multiple Choice

A ____________ is an instrument used to measure the wattage consumed by an electric motor or an electric device.

Explanation:
Measuring the wattage consumed by a motor or device is about determining real power, the rate at which energy is used. A wattmeter is built to do just that by combining measurements of voltage and current (and, in AC circuits, accounting for the phase angle between them). This lets it display watts, the unit of real power. In contrast, an ammeter only measures current, a voltmeter only measures voltage, and an ohmmeter measures resistance. So the instrument described is the wattmeter.

Measuring the wattage consumed by a motor or device is about determining real power, the rate at which energy is used. A wattmeter is built to do just that by combining measurements of voltage and current (and, in AC circuits, accounting for the phase angle between them). This lets it display watts, the unit of real power. In contrast, an ammeter only measures current, a voltmeter only measures voltage, and an ohmmeter measures resistance. So the instrument described is the wattmeter.

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