Circuit containing Capacitor and resistance in series|Alternating Current
Circuit containing capacitance and resistance in series
- Figure below shows a circuit containing capacitor and resistor connected in series through a sinusoidal voltage source of voltage
V=V_{0}sin(ωt+φ)
- In this case instantaneous P.D across R is
V_{R}=IR
and across the capacitor C is
V_{C}=I/ωC
- In this case V_{R} is in phase with current i and V_{C} lags behind i by a phase angle 90_{0}
- Figure 11(b) shows the phasors diagram where vector OA represent the resultant of V_{R} and V_{C} which is the applied Voltage thus
is called the impedance of the circuit
- Again from the phasors diagram applied voltage lags behind the current by a phase angle φ given by
tanφ= V_{C}/ V_{R}=1/ωCR ---(18)