모두CBT
전류 2Isin(wt+θ)[A]\sqrt{2}I\sin(wt+\theta)[A]2Isin(wt+θ)[A] 와 기전력 2Vcos(wt−ϕ)[V]\sqrt{2}V\cos(wt-\phi)[V]2Vcos(wt−ϕ)[V] 사이의 위상차는?
π2−(ϕ−θ)\dfrac{\pi}{2}-(\phi-\theta)2π−(ϕ−θ)
π2−(ϕ+θ)\dfrac{\pi}{2}-(\phi+\theta)2π−(ϕ+θ)
π2+(ϕ+θ)\dfrac{\pi}{2}+(\phi+\theta)2π+(ϕ+θ)
π2+(ϕ−θ)\dfrac{\pi}{2}+(\phi-\theta)2π+(ϕ−θ)