An alternating potential difference square-wave is applied across a series circuit containing a capacitor of capacitance CCC and a resistor of resistance RRR. The period of the input signal is 80 ms80\text{ ms}80 ms.
Calculate the frequency fff of the input square-wave signal.
The graph shows the variation of the charge QQQ on the positive plate of the capacitor with time ttt.
Create a calculation using the discharging section from t=40 mst = 40\text{ ms}t=40 ms to t=80 mst = 80\text{ ms}t=80 ms to determine the time constant of this circuit in ms\text{ms}ms.
Calculate the maximum magnitude of the current in the resistor.
