Why do potentiometers have 3 terminals?

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Tags

1. #other
2. #connected
3. #increase
4. #voltage
5. #basically
6. #wiper
7. #potentiometer
8. #divider
9. #behave
10. #terminals
11. #variable
12. #resistor
13. #decreasing
14. #resistance
15. #while
16. #terminal