Principle

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.

Benefits


No additional cable connections between the building blocks needed - clear arragned and quick setup

Contact saftey due to puzzle blocks system

Corrosion-free gold plated contacts

Doubled earning sucess: Electric circuit diagram on top, real components can be seen unterside



Tasks

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.