What does an AC voltmeter indicate?

An AC voltmeter is specifically designed to measure the voltage of an alternating current (AC) system. When it indicates AC voltage, it does so in volts, which is the standard unit of measure for electrical potential difference. This device provides the value of the voltage as generated by a generator or supplied by the electrical network at any given moment.

The measurement is critical in evaluating the performance and operating conditions of electrical systems. By indicating the voltage produced by the generator, users can ensure that the output is within the required specifications for safe and efficient operation.

The other aspects included in different choices pertain to other electrical parameters. Voltage is a distinct measurement related to the potential difference, while frequency refers to how often the current changes direction in a second, typically measured in hertz. Amperage relates to current flow, which is a different aspect from voltage. Finally, power factor readings indicate the efficiency of the electrical system concerning the load it is driving, which also has no direct relation to the voltage measurement itself.