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2.2 Analogue electronics.Resistors (7). Variable resistors

They are resistors with a variable value,  between zero and its maximum. They are also known as potentiometers. They are used to act on a circuit, for example to adjust sensitivity. They have 3 legs. The resistance between the two outside legs is fixed. By moving the middle leg or cursor, we adjust the resistance between the middle leg and the outside legs. 


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