RC Series Circuit
A circuit that contains pure resistance R ohms connected in series with a pure capacitor of capacitance C farads is known as RC Series Circuit.
V=rms value of applied voltage
I=rms value of the circuit current
Voltage across R ,VR=IR where VR is in phase with I.
voltage across C,Vc=IXc where Vc lags I by 90°.
Taking current as references phasor .
The voltage drop VR=IR is in phase with current and is represented in magnitude and direction by the phasor OA.The voltage drop Vc=IXc lags behind the current by 90° and is represented in magnitude and direction by the phasor AB.
The applied voltage V is the phasor sum of these two drops
I. Phase angle
Current I leads the applied voltage V by Φ°.
since current is taken as reference phasor, negative phase angle implies that voltage lags behind the current. This is the same thing as current leads the voltage.
Inductors in series and parallel
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