Power dissipated in an LCR series circuit connected to an a.c....

Options

1. A\varepsilon^2 R / \sqrt{R^2+\left(L \omega-\frac{1}{C \omega}\right)^2}
2. B$\varepsilon^2 \mathrm{R} /\left[\mathrm{R}^2+\left(\mathrm{L} \omega-\frac{1}{\mathrm{C} \omega}\right)^2\right]$
3. C$\varepsilon^2 \sqrt{\left[\mathrm{R}^2+\left(\mathrm{L} \omega-\frac{1}{\mathrm{C} \omega}\right)^2\right]} / \mathrm{R}$
4. D$\frac{\varepsilon^2\left[\mathrm{R}^2+\left(\mathrm{L} \omega-\frac{1}{\mathrm{C} \omega}\right)^2\right]}{\mathrm{R}}$