question_answer

A circuit has a resistance of\[12\,\Omega \]and an impedance of\[15\,\Omega \]. The power factor of the circuit will be     AIEEE  Solved  Paper-2005

A) 0.8         

B)        0.4         

C)        1.25       

D)        0.125

Correct Answer: A

Solution :

Power factor \[=\cos \phi =\frac{R}{Z}\,=\frac{\text{Resistance}}{\text{Impedance}}\]