question_answer

The voltage V and the current flowing through an instrument in an AC circuit are given by:             \[\text{V=cos}\,\,\text{t}\,\text{volt,}\] \[I=2\,\sin \,\omega t\] amp             The power dissipated in the instrument is:            

A)              2.5 watts                                

B)              zero watt

C)                                     5 watts     

D)                                     10 watts