1. A waveform has a form factor of 1.6, and an average value of 10 V. Calculate its r.m.s. value.
2. A moving coil voltmeter, calibrated for sinewaves, is used to measure a voltage waveform having a form factor of 1.25. Determine the true r.m.s. value of this voltage, if the meter indicates 25 V. Explain why the meter does not indicate the true value.