potentiometer level measurement

A potentiometer is a device to measure potential difference across a conductor on the basis of null point. Principle of Potentiometer: It's based on Ohm's law i.e. V=IR V= I rho l/A [ R= rho l/A]

A potentiometer is a manually adjustable resistor. The way this device works is relatively simple. One terminal of the potentiometer is connected to a power source. Another is hooked up to ground (a point with no voltage or resistance and which serves as a neutral reference point), while the third t