Question

If power factor = 1, then the current to the load is ______ with the voltage across it.

(a) out of phase

(b) in phase

(c) 90⁰ out of phase

(d) 45⁰ out of phase

This question was posed to me in exam.

I would like to ask this question from Apparent Power and Power Factor in portion Power and Power Factor of Network Theory

Answer 1

Correct answer is (b) in phase

The explanation is: If power factor = 1, then the current to the load is in phase with the voltage across it because the expression of power factor is power factor = cosθ.