Question

In an AC circuit, current is $3A$ and voltage $210V$ and power is $63W$. The power factor is

• A. $0.11$
• B. $0.09$
• C. $0.08$
• D. $0.10$

Answer 1

Answer: (D)

$0.10$

We know that the power drawn by the circuit is given as:

$P=I.V\cos \theta$

Here, power factor is $cos\theta$

$\therefore \cos \theta =\frac{P}{IV}=\frac{63}{3\times 210}=0.1$