Question

Draw phasor diagram of LCR series ac circuit.

Answer 1

• As shown in the phasor diagram, the voltage across the inductor $L$ is leading the current with a phase $\frac{\pi }{2}$
• and the voltage across the capacitor is lagging the current by a phase $\frac{\pi }{2}$.
• the voltage across the resistor is in phase with the current so the vector representing $V_R$ is parallel to that for $I$
  
• The $\text{Current vector is smaller than the vector for voltage of resistance}$ as $I=\frac{V_R}{R}$.