In a circuit where the AC voltage and...

In a circuit where the AC voltage and...

Question 1 of 27070Yv1ko7D3i9cYGV3y3qpE

In a circuit where the AC voltage and current are out of phase, how can the true power be determined?

Question 1 of 27070

Q

In a circuit where the AC voltage and current are out of phase, how can the true power be determined?

🔍 Key Concepts

• Apparent power (VA) vs true (real) power (W) in AC circuits • Meaning of power factor (PF) and its relationship to phase angle between voltage and current • Basic formula connecting apparent power (S), true power (P), and power factor (PF)

💭 Think About

• How is apparent power calculated from RMS voltage and RMS current in an AC circuit? • What does the power factor numerically represent in terms of how much of the apparent power is doing useful work? • Which mathematical operation would you use if power factor tells you "what fraction" of apparent power is real power?

✅ Before You Answer

• Recall and write down the formula relating P (true power), S (apparent power), and PF (power factor). • Check which choice correctly reflects a fraction of apparent power, not more than or less than it in the wrong way. • Verify which option uses both apparent power and power factor together, instead of ignoring one of them.