What is meant by resonance in an LCR circuit?

In the above circuit, $C=\frac{\sqrt{3}}{2}\mu F,R_2=20\mathrm{ \Omega },L=\frac{\sqrt{3}}{10}H$ and $R_1=10\mathrm{ \Omega }.$ Current in $L\text{-}{R}_1$ path is $I_1$ and in $C-R_2$ path it is $I_2.$ The voltage of $$AC source is given by, $V=200\sqrt{2}\sin \left(100t\right)$ volts. The phase difference between $I_1$ and $I_2$ is:

Find the peak current and resonant frequency of the following circuit (as shown in figure).

A parallel plate capacitor in series with a resistance of $100 \mathrm{\Omega },$ an inductor of $20 \mathrm{mH}$ and an $AC$ voltage source of variable frequency shows resonance at a frequency of $\frac{1250}{\pi }\mathrm{Hz}$. If this capacitor is charged by a $DC$ voltage source to a voltage $25 \mathrm{V},$ what amount of charge will be stored in each plate of the capacitor?

What will be the reading in the voltmeter and ammeter of the circuit shown?

In the given circuit, the resonant frequency is

Match List-I with List-II.

Choose the correct answer from the options given below.

The readings of ammeter and voltmeter in the following circuit are respectively