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An inductance of $1 \mathrm{mH}$ a condenser of $10 \mu \mathrm{F}$ and a resistance of $50 \Omega$ are connected in series. The reactances of inductor and condensers are same. The reactance of either of them will be
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$10 \Omega$
$\begin{aligned} & \text { Given } \omega L=\frac{1}{\omega C} \Rightarrow \omega^2=\frac{1}{L C} \\ & \text { or } \omega=\frac{1}{\sqrt{10^{-3} \times 10 \times 10^{-6}}}=\frac{1}{\sqrt{10^{-8}}}=10^4 \\ & X_L=\omega L=10^4 \times 10^{-3}=10 \Omega\end{aligned}$
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