Potentiometers

A potentiometer is a variable resistor with three terminals whose voltage is adjustable manually with the help of a movable contact, in order to control the flow of electric current through it. 
The potentiometer is variable and we can fix different values of resistance in the same potentiometer.
Although we have a lot of option the most commonly used potentiometers are valued as 10kΩ, followed by 1kΩ, 5kΩ, and 100kΩ.