Which statement accurately describes the function of a dual-voltage motor?

A dual-voltage motor is designed to operate at two different voltage ratings, allowing for greater flexibility in its applications. This capability enables the motor to be connected to two distinct voltage systems without requiring significant modifications or specialized equipment.

For example, such a motor may be capable of operating at both 120V and 240V, making it suitable for use in different electrical environments. This versatility means it can be used in applications where the voltage supply may vary, which is particularly useful in industrial settings or areas where different voltage standards are present.

The other options do not accurately describe the function of a dual-voltage motor. Operating only on low voltage misrepresents its capabilities. The motor's ability to automatically increase voltage does not reflect the dual-voltage feature, as the motor simply uses the supply voltage it is connected to. Additionally, dual-voltage motors can indeed be utilized in residential applications, contrary to the implication that they cannot be used in such settings.