Explanation

(c) (i) In a circuit having C alone, the voltage lags the current by $\frac{\pi}{2}$.
(ii) In a circuit containing R and L, the voltage leads the current by $\frac{\pi}{2}$.
(iii) In L – C circuit, the phase difference between current and voltage can have any
value between 0 to $\frac{\pi}{2}$ depending on the values of L and C.
(iv) In a circuit containing L alone, the voltage leads the current by $\frac{\pi}{2}.$