How to find peak to peak and rms current for square wave AC circuit?
I have a circuit with AC square wave at 10V and 4 Hz. There is only a
  single resistor of 1000 ohm in the circuit. I would like to calculate
  the rms current and also the peak to peak current of this circuit.





So calculate RMS current based on the peak voltage of 10 volts and 1000 ohms.
The peak current is also the same as the RMS current
The peak to peak current is twice the peak current.