The power factor of ICR circuit at resonance is\

Question

Professor PC Thomas Classes · Answer

Impedance of the LCR circuit, $$ Z \sqrt{R^{2}+\left(X_{L}-X_{C}ight)^{2}} $$ At resonance, $\mathrm{X}_{\mathrm{L}}=\mathrm{X}_{\mathrm{C}}$ $$ 	herefore \mathrm{Z}=\mathrm{R} $$ Power factor, $\cos \phi=\frac{\mathrm{R}}{\mathrm{Z}}=1$\