For the circuit given in the power factor is 0.72 lagging and(adsbygoogle = window.adsbygoogle || []).push({});

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

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# Homework Help: AC Circuits confirmation

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