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Step 1 of 3 4.005E Refer to Figure E4.5 for an ac voltmeter in the text book. Assume the diode is ideal. During the positive half cycle of the input, the diode is in forward bias condition. The positive v, causes the current flows through the diode in the forward direction. In forward bias condition, the ideal diode acts as a short circuit. Thus, the output voltage is same as the input voltage. The equivalent circuit is shown in Figure 1. + R v₁ + Figure 1 Step 2 of 3 Determine the average value of the input voltage. Substitute 10 V for in the equation. Step 3 of 3 Apply Ohm's law to the circuit and determine the value of resistor. Substitute 1 mA for I , 50 Ω Ω for Rm and 3.183 V for in the equation. R=3183-50 =3133 =3.133x10³ Thus, the value of resistor in the circuit, R is 3.133 kΩ