For the circuit given in the power factor is 0.72 lagging and the power dissipated is 375 W. Determine the: (1) apparent power (2) reactive power (3) the magnitude of the current flowing in the circuit (4) the value of the impedance Z and state whether circuit is inductive or capacitive. (1) Apparent power = True power / Power Factor (S=P/pf) = 375 / 0.72 = 520.8333 VA (2) Reactive Power = SQRT (apparent power^2) - (True Power^2) = SQRT (520.8333^2)-(375^2) = SQRT (130642.3264) = 361.4448 VAR (3) Magnitude of Current Power= Voltage*Current *Power factor (P=V*I*pf) 375 = 120*I*0.72 I = P/(V*pf) I = 375/(120*0.72) I = 4.34 A (4) Total ohms = Voltage/Current = 120/4.34 =27.6498 ohms (minus 10) z = 17.65 ohms The power factor is lagging within the circuit therefore the the virvuit is inductive Am i on the right lines here? or is there a better way of calculating the above results
Also if I calculate the current using I*2 R for the resistive part of the circuit I get a different result!
Please help.
Kml565
Also if I calculate the current using I*2 R for the resistive part of the circuit I get a different result!
Please help.
Kml565