RC Series Circuit

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.

Let ,

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.

II. Power

Related terms:

RL series circuit

Magnetic circuits

Inductors in series and parallel

For more notes on Electrical Engineering:



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