In an AC circuit, the current is given by $\mathrm{i}=5\sin \left(100\mathrm{t}-\frac{\mathrm{\pi }}{2}\right)$ amperes and the AC potential is $\mathrm{V}=200\sin \left(100\mathrm{t}\right)\text{ volt. }$ Then the power consumption is

• A

  20 watts

• B

  40 watts

• C

  1000 watts

• D

  0 watt