Power dissipated in RLC series a.c. Since power isn't dissipated in L and C, it is only dissipated in R. Maximum power is transferred when the supply potential and the current to the ciruit are in phase. The power is reduced by cos f when the supply potential and the current are not in phase. A 45 V rms, 1000rad.s -1 supply is connected in series with a 50.6 W resistor and a practical inductor which has 40mH inductance and 30 W resistance combined. Find the power dissipated in the two elements, the total power dissipated in the circuit, the power factor for the circuit.
Electrical resonance is analogous to mechanical resonance.
Since the energy transferred to the system is a maximum at resonance, current in RLC series circuit will reach its maximum at resonance. This phenomenon is observed at the resonant frequency of RLC circuit. Current in RLC series circuit depends on frequency of the source. Example Radio and television sets, use resonance circuits for tuning in a station. Many frequencies reach the circuit, but a significant current flows only for frequencies at or near the resonant frequency.