The power factor of a choke coil having inductance L and resistance r is given by :
A. \(\sqrt{r^{2}+\omega^{2} L^{2}}\)
B. \(\sqrt{\frac{r^{2}+\omega^{2}+L^{2}}{r}}\)
C. \(\frac{r}{\sqrt{r^{2}+\omega^{2} L^{2}}}\)
D. r2 + ω 2 L2
Answer:C
The power factor of a choke coil having inductance L and resistance r is given by :
A. \(\sqrt{r^{2}+\omega^{2} L^{2}}\) B. \(\sqrt{\frac{r^{2}+\omega^{2}+L^{2}}{r}}\) C. \(\frac{r}{\sqrt{r^{2}+\omega^{2} L^{2}}}\) D. r2 + ω 2 L2