Faatupu se lomiga e sili atu ona faigata o lenei fuaiupu O le potentiometer o se meafaigaluega mo le fuaina o le gafatia (po o le voltage) i se matagaluega.
O le mea moni, o se lomiga e sili atu ona faigata o le fuaiupu o le "A potentiometer is an instrument for measuring the potential (or voltage) in a circuit taps off a fraction of a known voltage from a resistive slide wire and compares it with the unknown voltage by means of a galvanometer".