How Potentiometer works:
n electrical engineering parlance, the term "potentiometer" is used in either one of two ways. It may refer to an instrument that measures an unknown emf or voltage by comparing it to a standard emf. In this capacity, it is functioning as a null instrument; it permits precision measurement by adjusting the value of a circuit element until a meter reads zero. Alternatively, "potentiometer" may refer to an electronic component that is used to vary the resistance in a circuit. In this article, we discuss the construction and working principle of the resistive component. A potentiometer is also referred to as a variable resistor or pot. They have three terminals, where the one in the middle is known as the wiper, and the other two are known as ends. The wiper is a movable contact where resistance is measured with respect to it and either one of the end terminals.
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