The power factor of an $A C$ circuit having resistance $(R)$ and inductance $(L)$ connected in series and an…

The power factor of an $A C$ circuit having resistance $(R)$ and inductance $(L)$ connected in series and an angular velocity $\omega$ is
  1. $\mathrm{R} / \omega \mathrm{L}$
  2. $\mathrm{R} /\left(\mathrm{R}^2+\omega^2 L^2\right)^{1 / 2}$
  3. $\omega \mathrm{L} / \mathrm{R}$
  4. $R /\left(R^2-\omega^2 L^2\right)^{1 / 2}$

Solution

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Asked in: JEE Main 2002

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