In this dynamic model the electrical potential [math]\phi[/math] is visualised using different colours and intensities. A battery with a nominal voltage [math]V_0[/math] maintains potential difference by pumping electrons from one part of the circuit and pumping them into another. Consequently, there is always a maximum potential difference of [math]\phi_-[/math] blue and [math]\phi_+[/math] red at the poles and different electrical potential at various points within an electrical resistance such as a thin wire. The voltage between two points of the wire can be explained by the potential difference [math]\Delta\phi=\phi_2-\phi_1[/math].

[list][*]Put the model on your circuit as described on the AR instructions page[br][/*][*]Set [math]V_0[/math] according to your voltage source and align the line with the wire[/*][*]Measure the voltages between two points of the wire[/*][*]Move the points in the model and check their potential difference[/*][/list]