Power factor in AC circuits equals:

A V/I

B cos(φ), where φ is the phase angle between voltage and current

C sin(φ)

D tan(φ)

✓ Correct Answer: Option B

PF = cos(φ) = P_real/S_apparent. PF = 1 for resistive loads (φ = 0). Reactive loads have PF < 1.

💡 Why is B) the correct answer?

The correct answer to the question "Power factor in AC circuits equals:" is Option B: cos(φ), where φ is the phase angle between voltage and current.

The other options — A) V/I, C) sin(φ), D) tan(φ) — are incorrect for this FE Exam Prep question. As explained above: PF = cos(φ) = P_real/S_apparent. PF = 1 for resistive loads (φ = 0). Reactive loads have PF < 1.

📚 About This FE Exam Prep Practice Question

This 2-level FE Exam Prep question from the Electrical Circuits topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free FE Exam Prep practice test or use flashcards for spaced repetition review.

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Power factor in AC circuits equals:

✓ Correct Answer: Option B

📚 About This FE Exam Prep Practice Question

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