Source: wikibot/liquid-rheostat
= Liquid rheostat
{wiki=Liquid_rheostat}
A liquid rheostat is an electrical device used to control the resistance in an electric circuit by using a liquid conductor. It typically consists of a reservoir filled with a conductive liquid, such as a saline solution or mercury, through which an electrode is immersed. The level of the liquid or the position of the electrode can be adjusted to vary the resistance, thus controlling the flow of current in the circuit.