In a series RLC circuit at resonance

(A) Impedance is maximum
(B) $X_C = X_L$
(C) $Z= R$
(D) $ω =\frac{1}{\sqrt{LC}}$

Choose the correct answer from the options given below:

(B), (C) and (D) only

The correct answer is Option (4) → (B), (C) and (D) only

At resonance in a series RLC circuit:

(B) The capacitive reactance equals the inductive reactance: $X_C = X_L$

(C) Since $X_C = X_L$, the net reactance becomes zero and the impedance becomes purely resistive: $Z = R$

(D) Resonance occurs at angular frequency: $\omega = \frac{1}{\sqrt{LC}}$

(A) is incorrect because at resonance, impedance is minimum, not maximum.