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Question

Answer the following :
What is the value of impedance of a resonant series LCR circuit?

Solution
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At Resonant $$X_C = XL$$
$$\therefore $$ Impedance , $$Z = \sqrt{R^2+(X_L-X_c)^2}$$
$$\Rightarrow Z= \sqrt{R^2+0} = R$$ (Resistance of circuit)

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