![]() Draw the resultant vector(V G) of these two voltages. We know that in inductor, voltage leads current by 90 o, so draw V L (voltage drop across inductor) perpendicular to current phasor. So draw the voltage phasor, V R along same axis or direction as that of current phasor. ![]() In case of resistor, both voltage and current are in same phase. So, take current phasor as reference and draw it on horizontal axis as shown in diagram. In case of series RL circuit, resistor and inductor are connected in series, so current flowing in both the elements are same i.e I R = I L = I. The voltage leads that of current by 90 o or in other words, voltage attains its maximum and zero value 90 o before the current attains it.įor drawing the phasor diagram of series RL circuit follow the following steps: In inductor, the voltage and the current are not in phase. In case of resistor, the voltage and the current are in same phase or we can say that the phase angle difference between voltage and current is zero. Before drawing the phasor diagram of series RL circuit, one should know the relationship between voltage and current in case of resistor and inductor.
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