Which characteristic is associated with a single-phase generator?

A single-phase generator is primarily characterized by its ability to supply power using a single alternating current (AC) waveform. This type of generator is generally limited to lower power outputs compared to three-phase or high-frequency generators. As a result, when comparing single-phase generators with high-frequency generators, single-phase generators typically exhibit less capacity for delivering power and handling larger electrical loads efficiently. This is due to their design, which focuses on simpler, lower-capacity applications, often making them suitable for residential or light commercial use rather than heavy industrial applications.

In the context of the other options, high-frequency generators are designed to provide increased capacity and stability, particularly in applications requiring a more consistent voltage output. They also facilitate advanced functionalities like producing digital images, which single-phase generators cannot achieve as effectively due to their design limitations. Stability in output voltage can vary significantly between different types of generators, but in general, high-frequency generators are engineered to deliver a more stable output than the single-phase variety. Therefore, while the options present varying characterizations, the less capacity feature distinctly aligns with the inherent nature of single-phase generators.