The power factor of an AC circuit having resistance R and inductance L connected in series and an angular velocity ω is

Question

The power factor of an AC circuit having resistance R and inductance L connected in series and an angular velocity ω is (A) R / ω L (B) R /(R2+ω2 L2)1 / 2 (C) ω L / R (D) R /(R2-ω2 L2)1 / 2

Tardigrade Admin · Accepted Answer

cos φ=(R/Z)=(R/(R2+ω2 L2)1 / 2)

Q. The power factor of an $A C$ circuit having resistance $R$ and inductance $L$ connected in series and an angular velocity $ω$ is

$R / ω L$

$R / (R^{2} + ω^{2} L^{2})^{1/2}$

$ω L / R$

$R / (R^{2} - ω^{2} L^{2})^{1/2}$

$cos ϕ = \frac{R}{Z} = \frac{R}{( R ^{2} + ω ^{2} L ^{2} ) ^{1/2}}$

Q. The power factor of an AC circuit having resistance R and inductance L connected in series and an angular velocity ω is

R/ωL

R/(R2+ω2L2)1/2

ωL/R

R/(R2−ω2L2)1/2