Question

A sinusoidal voltage of r.m.s. value 100 V is connected to an ideal junction diode as shown in figure . the maximum potential difference across the capacitor will be

• A. 100V
• B. $100\sqrt{2}V$
• C. $50\sqrt{2}V$
• D. ZERO

Answer 1

Answer: (C)

$50\sqrt{2}V$

The maximum potential across the capacitor ${\text{V}}_{max}$ and the r.m.s. value of the sinusoidal voltage ${\text{V}}_{r.m.s.}$ can be related as-

${\text{V}}_{max}.\sqrt{2}={\text{V}}_{r.m.s.}$

${\text{V}}_{max}=\frac{100}{\sqrt{2}}=50\sqrt{2}\text{Volt}$