AC/DC not the band. #1
The above schematic shows a simple circuit. What is the voltage that would be read on the DC voltmeter?
Assumptions. Both the AC and DC voltmeters have high impedance values. The AC voltage is supplied directly from a typical north American 120-volt residential power receptacle.
Give your answer in volts DC to one decimal place.
The answer is 169.7.
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1 solution
The AC power source would be a sine wave with a RMS voltage measured at 120 Volts. The diode would allow only the positive voltage phase of the AC cycle to the capacitor. The capacitor would charge to the peak of the AC + voltage V p e a k = V R M S 2 = 1 2 0 2 = 1 6 9 . 7 V