SOLVED:In an ac circuit in which a phase angle θexists, the voltage and current are written as ϕ =ϕmax cos(2 πf t) i =imax cos(2 πf t-θ) Show that the electrical current power averaged over one period (1 / f) is (Ẇ)eloctrical ave =-((1)/(2))(ϕmax) imax cos(θ)=-ie cos(θ) and thus the average power of any purely reactive (θ=π/ 2) circuit consisting entirely of ideal inductors and capacitors is zero. The term cos(θ) is called the power factor, and the product ie is called the apparent pow
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