If peak voltage across a full wave rectifier is 20V then Vrms is:

Explanation

Option A: 7.07V: This option represents the RMS (Root Mean Square) voltage of 7.07V. However, since the given peak voltage is 20V, this option is not correct. The correct RMS voltage should be higher than half of the peak voltage.Option B: This option represents the RMS voltage of 14.14V. It is the correct answer based on the given peak voltage of 20V. The RMS voltage is calculated by dividing the peak voltage by the square root of 2.To calculate the RMS (Root Mean Square) voltage across a full-wave rectifier, we can use the following formula:Vrms = Vpeak / √2Given that the peak voltage across the full-wave rectifier is 20V, we can calculate the RMS voltage as follows:Vrms = 20V / √2Vrms ≈ 14.14VOption C: 16.8V: This option represents a value higher than the given peak voltage of 20V. It is not correct because the RMS voltage cannot be greater than the peak voltage.Option D: 12V: This option represents a value lower than the given peak voltage of 20V. It is not correct because the RMS voltage should be higher than half of the peak voltage.