Easy
$A$ $L-C-R$ series $AC$ circuit is tuned to resonance. The impedance of the circuit is now . . . . . . .
- A$R$
- B$\left[R^{2}+\left(\frac{1}{\omega C}-\omega L\right)^{2}\right]^{\frac{1}{2}}$
- C$\left[R^{2}+(\omega L)^{2}+\left(\frac{1}{\omega C}\right)^{2}\right]^{\frac{1}{2}}$
- D$\left[R^{2}+\left(\omega L-\frac{1}{\omega C}\right)^{2}\right]^{\frac{1}{2}}$
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