On which factor does the sharpness of resonance depend?

An $L-C-R$ circuit is connected to a source of $A.C.$ current. At resonance,the phase difference between the applied voltage and the current in the circuit is:

An inductance of $1\, mH$,a capacitor of $10\, \mu F$,and a resistance of $50\, \Omega$ are connected in series. The reactances of the inductor and the capacitor are the same. The reactance of either of them will be........$\Omega$.

In an $LCR$ series resonance circuit, choose the wrong statement.

In the circuit shown, the ratio of the quality factor $(Q)$ and the band width $(BW)$ is (Given: band width = $R/L$)

With the gradual increase in frequency of an $A.C.$ source,the impedance of an $LCR$ series circuit