Question

The impedance of a circuit consists of $3\Omega$ resistance and $4\Omega$ reactance. The power factor of the circuit is

• A. 0.4
• B. 0.6
• C. 0.8
• D. 1.0

Answer 1

Answer: (B)

We know that
$\tan \varphi =\frac{X}{R}=\frac{4}{3}$
Then, power factor $=\cos \varphi$
$=\frac{3}{5}$
$\Rightarrow$ $\cos \varphi =0.6$