AC Circuits
From Ohm’s Law, we have V = IR, where R is a constant that depends on the material and geometry of the materials used to conduct the current. Thus, I = V/R = (NBAw/R) sin(wt) = Io sin(wt) , where
Io = NBAw/R = Vo/R . The alternating voltage creates an alternating current!
From this we see that the electric power is:
P = I V = IoVo sin2(wt) .