In this demonstration we measure the voltages across the resistor and the capacitor to investigate the time needed to discharge a capacitor and determine the RC time constant of an RC series circuit. In the apparatus, we have an RC circuit, a data acquisition hardware and data displayed through a Labview program. We can see that when an alternating input voltage (on and off) is applied to the circuit, the capacitor gets charged and displays a gradual increase and decrease in the voltage.

Click here for the LabView code