For a series $RLC$ circuit:- 
(a) Voltage across $L$ and $C$ are differ by $\pi$.
(b) Current through $L$ and $R$ are in the same phase.
(c) Voltage across $R$ and $L$ differ by $\frac{\mathrm{\pi }}{2}$.
(d) Voltage across $L$ and current through $C$ differ by $\frac{\mathrm{\pi }}{2}$.

If value of R is changed, then :- 
   

In a series LCR circuit voltage across resister, inductor and capacitor are 1V, 3V and 2V respectively. At the instant t when the source voltage is given by :
V = V₀ cos $\text{ω}$t, the current in the circuit will be : 

In given LCR circuit, the voltage across the terminals of a resistance & current will be