A charged `30 mu F` capacitor is connected to a 27 mH inductor. The angular frequency of free oscillations of the circuit is

A charged 30muF capacitor is con¬ nected to a 27 mH inductor. What is the angular frequency of free oscillations of the circuit?

A circuit containing a 10 Omega resistor and 1 mu F capacitor in series is connected to a 220 V ac supply of angular frequency 100 rads^(-1) . Find the impedance of the circuit?