A sinusoidal voltage of rms value 200 volt is connected to a diode and a resistor R in the circuit as shown in Fig., so that half wave rectification occurs. If the diode is ideal, what is the rms voltage across R? If resistor R is replaced by capactior of capacitance C, find the potential difference across C.

Explanation

The output rms voltage in half wave rectifier circuit across R is,
`V_(rms)^(')=V_(0)/2=(V_(rms)sqrt(2))/2=(200sqrt(2))/2 =100sqrt(2)V`
If Ris replaced by C then pot. diff. across C
`=V_(0)=V_(rms)sqrt(2)=200sqrt(2)V`