An inductor of inductance L and resistor of resistance R are joined in series and connected by a source of frequency $\mathrm{\omega }$ . Power dissipated in the circuit is 

• A

  $\frac{({\mathrm{R}}^2+{\mathrm{\omega }}^2{\mathrm{L}}^2)}{\mathrm{V}}$

• B

  $\frac{{\mathrm{V}}^2\mathrm{R}}{({\mathrm{R}}^2+{\mathrm{\omega }}^2{\mathrm{L}}^2)}$

• C

  $\frac{\mathrm{V}}{({\mathrm{R}}^2+{\mathrm{\omega }}^2{\mathrm{L}}^2)}$

• D

  $\frac{\sqrt{{\mathrm{R}}^2+{\mathrm{\omega }}^2{\mathrm{L}}^2}}{{\mathrm{V}}^2}$