a resistor with three terminals, the third being an adjustable center terminal; used to adjust voltages in radios and TV sets 同義詞:pot,
a measuring instrument for measuring direct current electromotive forces
百科解釋
A potentiometer (), informally a pot, is a three-terminal resistor with a sliding contact that forms an adjustable voltage divider. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat.