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There's a real and "imaginary" component to impedance, graphed on x-axis and y-axis respectively. Fine, but now the prof starts saying phase angle which he refers to the angle each impedance vector makes with the x-axis. Lots of people are telling me phase angle is the same as the phase shift. Convincing arguments too since impedance relates current and voltage, and phase shift would relate to two phase angles. I thought the phase angle is for an impedance vector at a particular frequency at a given time while the phase shift is the difference between two phase angles.

So, is a phase angle and phase shift actually the same in AC circuits???