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  4. A 220 V ac supply is connected between points A and B as shown in the figure. The potential difference across the capacitor C is

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Q. A 220 V ac supply is connected between points A and B as shown in the figure. The potential difference across the capacitor C isPhysics Question Image

Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

During positive half cycle, p-n junction conducts.
$\therefore \quad$ Potential difference across C
= Peak voltage of given ac voltage
$= V_{0} = V_{rms} \sqrt{2} = 220\sqrt{2}\,V$