Question
Explain how a potentiometer is used as a voltage divider.
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Answer
A potentiometer can be used as a voltage divider to continuously change the output voltage of a voltage supply. As shown in the below figure, potential difference $V$ is set up between points $A$ and $B$ of a potentiometer wire. One end of a device is connected to positive point $A$ and the other other end is connected to a slider that can move along wire $AB.$ The voltage $V$ divides in proportion of lengths $l_1$ and $l_2$ as shown in figure.
By using the slider we can change the output voltage from $0$ to $V.$
By using the slider we can change the output voltage from $0$ to $V.$
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