學士後西醫物理及化學題庫下載題庫

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.