Article no. P1373100 | Type: Experiments
The students should first recognize from the model that a given voltage can be divided with a potentiometer (voltage divider), and that the dividing function is based on the law for the series connection of resistances U1/R1 = U2/R2 = ... = Un/Rn. For a homogenous wire, we accordingly have l1/R1 = l2/R2 = ... = ln/Rn. The potentiometer must hereby not be under load. The students should then use a technical potentiometer, so that they can clearly understand how it functions by working with it.
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How does a potentiometer function?
Determine the working principle of a potentiometer from a model of a potentiometer and subsequently use a technical potentiometer to vary the brightness of a filament lamp.