What is the primary function of a potentiometer?

The primary function of a potentiometer is to adjust voltage levels by varying resistance. This is accomplished through the device's adjustable resistor, which can be turned to increase or decrease resistance in a circuit. When the resistance is changed, it alters the voltage drop across the potentiometer according to Ohm's Law.

In applications, this allows for fine control over voltage outputs, making potentiometers ideal for use in volume controls, dimmers, and other settings where gradual changes are necessary. By providing a means to dial in a specific voltage, potentiometers are essential components in many electronic circuits for controlling the operational characteristics of the device effectively.