Potentiometers are widely used for adjusting electrical parameters in a circuit. This is a single-turn 100KΩ potentiometer equipped with a rotating knob. It is commonly referred to as a rotary potentiometer, or simply a “POT.” A knob can be added not only for ease of use but also to enhance its appearance.

This particular potentiometer features a carbon track and provides a single-turn adjustable resistance of 100KΩ. It is designed for panel mounting and comes with a pre-fitted knob. The knob is attached to the plastic spindle, and rotating it alters the resistance. The change in resistance is linearly proportional to the angle of rotation.

In electronics, a potentiometer is essentially a manually adjustable resistor. It is most commonly used in consumer devices for controlling volume or tone in audio equipment, which is why it is often informally called a “volume” or “tone” control. Unlike measuring instruments, it does not have a scale or needle.

Potentiometers come in various shapes and sizes depending on their power rating, application, resistance value, and the materials used. However, all potentiometers share a common feature: a wiper that moves across a resistive track. The two ends of this resistive element, along with the wiper, are available as terminals, allowing the user to obtain a variable resistance between the wiper and either end.