52. An RLC circuit composed of a resistor, inductor, and capacitor connected in series with an AC voltage source. Which of the following statements is true?
(A) The current always lags the voltage by 90°due to the inductor.
(B) The current always lags the voltage by 90° due to the capacitor.
(C) The current always lags the voltage by 90° due to the resistor.
(D) The lag between the current and the voltage depends on the frequency of the AC voltage source.
(E) None of the above is true.
答案：D
統計：A:0,B:0,C:0,D:0,E:0
難度：計算中