Bennett Mechanical Comprehension Practice Test 2025 - Free Practice Questions and Review Guide

Question: 1 / 400

What instrument is specifically used to measure electric power?

Amperemeter

Wattmeter

The instrument used to measure electric power is a wattmeter. This device specifically quantifies the amount of electrical power consumed or produced in a circuit, measuring the product of voltage and current, taking into account the phase relationship between them. Power is defined in watts, which is where the name "wattmeter" comes from.

Other instruments serve different purposes: an amperemeter measures the flow of electric current in amperes, a voltmeter measures voltage in volts, and an ohmmeter assesses resistance in ohms. While these instruments provide important electrical measurements, they do not measure power directly, which is why the wattmeter is the correct choice for measuring electric power.

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Voltmeter

Ohmmeter

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