LC circuit|Q factor

The value of impedance in parallel LC circuit at resonance is (assuming inductor and capacitor to be ideal)

A 1.5 mH inductor in an LC circuit stores a maximum energy of 30 mu J . What is the maximum current in the circuit ?

A 1.5 mH inductor in LC circuit stores a maximum energy of 17 mu J. What is the peak current ?

What is the power factor of an LCR circuit connected to an AC source of angular frequency (1)/(sqrt(LC)) ?

In the circuit shown in fin. Calculate the capacitance C of the capacitor, if the power factor of the circuit is unity. Also, calculate Q factor of the circuit.

What is the natural frequency of LC circuit ? What is the reactance of this circuit at this frequency ?