A sinusoidal voltage of peak value 200 v...

A sinusoidal voltage of peak value `200` volts is connected to a diode and resistor `R` in the circuit shown so that half wave rectification occurs. If the forward resistance of the diode is negligible compared to `R` the `rms` voltage (in volt) across `R` is approximately

200

100

`200/sqrt(2)`

280

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