To find the rms voltage of the circuit, you need to know the value of the max current output and the power factor of the circuit. Unfortunately, you have not provided the power factor in your question. The power factor, denoted by the Greek letter "phi" (Φ), is a measure of how efficiently the electrical power is being used in the circuit. It is represented as the cosine of the phase angle difference between the voltage and current waveforms.
If you can provide the power factor of the circuit, I can assist you in calculating the rms voltage.
