Potentiometer
/pəˌtenʃiˈɑːmɪtər/
Definition 1 of 1
Pro Tip 1/3Component Function
A potentiometer can function as a variable resistor or a voltage divider in circuits. 
She turned the potentiometer to dim the lights.
Pro Tip 2/3Adjustment Tool
Potentiometers are commonly used to calibrate and adjust electronic devices for desired performance. 
Adjust the potentiometer carefully to fine-tune the radio signal.
Pro Tip 3/3Physical Form
Potentiometers can be knobs, sliders, or other controls found on many electronic devices. 
The mixer has several potentiometers for balancing sound levels.