The power factor of an ac circuit having resistance R and inductance L connected in series to an ac source of angular frequency ω is

Question

The power factor of an ac circuit having resistance R and inductance L connected in series to an ac source of angular frequency ω is (A) (R/ω L) (B) (ω L/R) (C) (R/√R2+ω2 L2) (D) zero

Tardigrade Admin · Accepted Answer

Power factor = cos φ=(R/Z) =(R/√R2+ω2 L2)

Q. The power factor of an ac circuit having resistance $R$ and inductance $L$ connected in series to an ac source of angular frequency $ω$ is

$\frac{R}{ω L}$

$\frac{ω L}{R}$

$\frac{R}{R ^{2} + ω ^{2} L ^{2}}$

zero

Power factor $= cos ϕ = \frac{R}{Z}$
$= \frac{R}{R ^{2} + ω ^{2} L ^{2}}$

Q. The power factor of an ac circuit having resistance R and inductance L connected in series to an ac source of angular frequency ω is

ωLR​

RωL​

R2+ω2L2​R​