Question

In an A.C circuit current is $2A$ and voltage is $220V$ and power is $44W$ power factor is ______

• A. $0.10$
• B. $1.80$
• C. $0.09$
• D. $0.18$

Answer 1

The correct option is A $0.10$

In A.C. circuits,

$P=V\cdot I\cos \varphi$

$\cos \varphi$ is the power factor.

$⟹44=2\times 220\times \cos \varphi ⟹44=440\times \cos \varphi \therefore \cos \varphi =0.10$