Alternating Current Part 1

A. In a purely resistive $A\ C$ circuit, the phase difference between the current and voltage is zero. B. In a purely inductive $AC$ circuit, the current lags the voltage, so the phase difference between the current and voltage is $\frac{\pi}{2}$. C. In a purely capacitive AC circuit the current leads the voltage, so the phase difference between the current and voltage is $\frac{\pi}{2}$. D. The phase difference between current \& voltage in an $L-C-R$ series circuit is $\phi = \tan^{-1} \frac{(X_C-X_L)}{R}$ $\therefore$ The correct match is A-(2), B-(3), C-(1), D-(4).