Phasor diagram for the following circuit ……..

Options

A.
B.
C.
D.

Answer

A

Explanation

Here R and C are in series. current passing through R and C are in phase, phase of I and axis. The magnitude of `I_mR` where `I_m` is maximum value of current and I and `V_R` are in same phase. So their phasor is on X-axis.
Now take `V_C`, its value is `L_mX_C`. The voltage across C that is `V_C` is lagging behind the current I passing through it by `pi/2` . Hence direction of `V_C` will be on negative Y-axis.