Question 181: AC fundamentals

Question

The power factor of $AC$ circuit having resistance $(R)$ and inductance $(L)$ connected in series and an angular velocity $\omega $ is

Accepted Answer

The impedance triangle for resistance $\left( R \right)$ and inductor $(L)$ connected in series is shown in the figure.
Power factor $\cos \phi  = {R \over {\sqrt {{R^2} + {\omega ^2}{L^2}} }}$

Answer

$R/\omega L$

Answer

$R/{\left( {{R^2} + {\omega ^2}{L^2}} \right)^{1/2}}$

Answer

$\omega L/R$

Answer

$R/{\left( {{R^2} - {\omega ^2}{L^2}} \right)^{1/2}}$

AC fundamentals

The power factor of AC circuit having resistance (R) and inductance (L) connected in series and an angular velocity \omega is

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