A conventional average-reading AC voltmeter (volt-ohm multimeter) has a schematic diagram as shown in Fig. P6–5. The needle of the meter movement deflects proportionally to the average current flowing through the meter. The meter scale is marked to give the RMS value of sine-wave voltages. Suppose that this meter is used to determine the RMS value of a noise voltage. The noise voltage is known to be an ergodic Gaussian process having a zero mean value. What is the value of the constant that is multiplied by the meter reading to give the true RMS value of the Gaussian noise?
