Pedagogical experimentation device for teaching electrokinetics
Résumé
This patent proposes a new mechanical analogy. The device consists of a string in a closed loop, which has been tied tightly around four pulleys fixed to a square or rectangular base. A weight hanging from a wire that has been wound round a pulley puts the string in the closed loop into motion. Friction can be applied to the string by pinching it. The speed at which the string moves depends on both the weight hanging from the pulley and the elements that are put in the circuit. The analogy aims to enable pupils to change their conceptual approach (from local reasoning to global reasoning).