TREVOR CLIFFORD PHOTOGRAPHY / SCIENCE PHOTO LIBRARY TREVOR CLIFFORD PHOTOGRAPHY / SCIENCE PHOTO LIBRARY
Linear potentiometer. Potentiometers are a type of variable resistor. On linear potentiometers such as this moving the slider (black) from one end to the other varies the resistance to electric current across the electrical contacts (black and brown knobs). Potentiometers are used in devices such as light dimmers and volume controls.
Model release not available. Property release not required.