Series RC Circuit - Practice Questions & MCQ

Series RC circuit -

The above figure shows a circuit containing resisitor and capacitor connected in series through a sinusoidal voltage source of voltage
which is given by -

Now, in this case, the voltage across resistor is V_R=IR

And, the voltage across the capacitor is -

As we have studied in the previous concept that the V_R is in phase with current I and V_C lags behind I by a phase angle 90^o

The above figure is the phase diagram of this case. So, the V is the resultant of  and . So we can write - 

Here, Z is the impedence of this circuit. 

Now, from the phasors diagram we can see that the applied voltage lags behind the current by a phase angle φ given by -

Important points - 

1. Capacitive susceptance () - 

2. Power factor

                               So,