What is the primary use of a potentiometer in electronic circuits?

A potentiometer is a type of variable resistor that is primarily used to provide variable voltages in electronic circuits. It operates by adjusting the resistance in a circuit to change the voltage output to different levels. This adjustability allows it to control various functions, such as the volume in audio equipment, the brightness of lights, or the speed of a motor.

When the wiper arm of the potentiometer is moved along the resistive track, it changes the voltage at the output terminal based on the proportion of the resistance that the wiper is positioned at. This capability to provide a range of voltages makes potentiometers an essential component in many types of variable control applications.

Understanding this function is crucial for those working with electronic circuits, as it highlights the versatility of potentiometers in creating dynamic responses in a circuit's operation.