College Physics 10th Edition by Raymond Serway,Chris Vuille

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A capacitor and a resistor are connected in series across an AC generator, as shown in Figure CQ21.17. After the switch is closed, which of the following statements is true (a) The voltage across the capacitor lags the current by 90 °. (b) The voltage across the resistor is out of phase with the current. (c) The voltage across the capacitor leads the current by 90 °. (d) The current decreases as the frequency of the generator is increased, but its peak voltage remains the same. (e) None of these