Potentiometers are also known as POT. They can provide variable resistance. By simply varying the knob on top of its head. This potentiometer has three terminals. So, One terminal connects to a sliding contact called a wiper. As well, the other two terminals connect to a fixed resistance track. This type of potentiometer is often used in audio volume control.
This is the pack 0f 10 pieces of 10K potentiometer 3 pin with in built on/off switch
Voltage control circuits
Volume control knobs
Analog input control knobs