꿈라CBT전압 및 전류가 다음과 같을 때 유효전력 \([\mathrm{W}]\) 및 역률 \([\%]\)은 각각 약 얼마인가?
\(v(t) = 100\sin\omega t - 50\sin(3\omega t + 30^{\circ}) + 20\sin(5\omega t + 45^{\circ})\,[\mathrm{V}]\)
\(i(t) = 20\sin(\omega t + 30^{\circ}) + 10\sin(3\omega t - 30^{\circ}) + 5\cos 5\omega t\,[\mathrm{A}]\)
\(v(t) = 100\sin\omega t - 50\sin(3\omega t + 30^{\circ}) + 20\sin(5\omega t + 45^{\circ})\,[\mathrm{V}]\)
\(i(t) = 20\sin(\omega t + 30^{\circ}) + 10\sin(3\omega t - 30^{\circ}) + 5\cos 5\omega t\,[\mathrm{A}]\)
- 1\(825\,[\mathrm{W}],\ 48.6\,[\%]\)
- 2\(776.4\,[\mathrm{W}],\ 59.7\,[\%]\)
- 3\(1120\,[\mathrm{W}],\ 77.4\,[\%]\)
- 4\(1850\,[\mathrm{W}],\ 89.6\,[\%]\)