question_answer

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

A)  0.4                                        

B)  0.6

C)  0.8                                        

D)  1.0

Correct Answer: B

Solution :

                We know that \[\tan \phi =\frac{X}{R}=\frac{4}{3}\] Then, power factor\[=\cos \phi \] \[=\frac{3}{5}\]