Which of the following statements are correct?

(A) In ac circuit containing only resistance, power consumption is $I^2R$,
(B) In an LCR circuit, there is resonance at zero phase difference between $X_C$ and $X_L$ and the power consumption is $I(ωX_C+ωX_L)^{1/2}$,
(C) In an LCR circuit, at resonance, impedance is minimum.
(D) In an LCR circuit, there is resonance at zero phase difference between $X_C$ and $X_L$ and the power consumption is zero.

Choose the correct answer from the options given below:

(A) and (C) only

The correct answer is Option (1) → (A) and (C) only

(A) In an ac circuit with only resistance: Power consumption $P = I^2R$ → Correct.

(B) In an LCR circuit: At resonance $X_C = X_L$, but the expression $I(\omega X_C + \omega X_L)^{1/2}$ for power is incorrect → Wrong.

(C) At resonance: Impedance $Z = R$, which is the minimum → Correct.

(D) At resonance: Phase difference = 0, but power consumption is not zero; it is maximum ($P = I^2R$) → Wrong.

Correct statements: (A), (C)