Question

A circuit has a resistance of $12\Omega$ and an impedance of $15\Omega$. The power factor of the circuit will be

• A. $0.8$
• B. $0.4$
• C. $1.25$
• D. $0.125$

Answer 1

Answer: (A)

$0.8$

Power factor of a circuit= $\frac{\text{Watts}}{\text{Volt-ampere}}$

$=\frac{VI\cos \theta }{VI}$

$\Rightarrow \cos \theta =\frac{12}{15}=0.8$