Alternating Current: JEE Mains 2022 June 29 Shift 2

An inductor of $0.5\ \text{mH}$, a capacitor of $200\ \mu\text{F}$ and a resistor of $2\ \Omega$ are connected in series with a $220\ \text{V}$ ac source. If the current is in phase with the emf, the frequency of ac source will be ______ $\times10^2\ \text{Hz}$.