1) An alternating voltage of 220 V 50 Hz frequency is applied across a capacitor of capacitance 2 μF. The impedence of the circuit is A) $\frac{\pi}{5000}$ B) $\frac{1000}{\pi}$ C) $500\pi$ D) $\frac{5000}{\pi}$ Answer: Option DExplanation:Impedance of a capacitor is $X_{c} = \frac{1}{\omega c}$ $X_{c} = \frac{1}{2\pi fc}$ = $\frac{1}{2\pi\times50\times2\times10^{-6}} = \frac{5000}{\pi}$
