A rheostat is an electrical device used in many applications that require adjustment of current or the varying resistance in an electric circuit.
Rheostats are used for increasing or decreasing a radio volume and reducing the electric motor speed of an electric motor.
In power control applications, they are replaced with switching electronics.
The rheostat symbol is the same as a normal resistor symbol including an arrow.
The arrow indicates the movable wiper.
There are two types of rheostat symbols are present 6.1 American standard: three terminals and zigzag lines 6.2 International standard: three terminals
