What is the purpose of a rotary selector switch?

The purpose of a rotary selector switch is to replace multiple switches by providing a single mechanism that allows the selection between different options or settings. Essentially, it's a versatile component that simplifies the control of various functions within a system. For instance, instead of having several individual switches for different settings or configurations, a rotary selector can combine those into one switch that the user turns to choose the desired option. This reduces the space needed on control panels and simplifies the overall design, making it more user-friendly and efficient.

Other alternatives, such as increasing voltage levels, limiting current flow, or acting as a fuse, refer to distinct functions of specific electrical components rather than the selective function of a rotary switch. Thus, those options do not accurately describe the primary purpose of a rotary selector switch.