what is potentiometer
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An instrument for measuring an electromotive force by balancing it against the potential difference produced by passing a known current through a known variable resistance.
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Potentiometer working can be explained when the potentiometer is understood. It is defined as a three-terminal resistor having either sliding or rotating contact that forms an adjustable voltage divider. In order to use the potentiometer as a rheostat or variable resistor, it should have only two terminals with one end and the wiper.
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