Phase Diagrams

(1) PURE RESISTANCE

e = e₀ sin t

I = I₀ sin t

e = e₀ sin (t + 0)

I = I₀ sin (t + 0)

(2) PURE INDUCTANCE

e = e₀ sin t

I = I₀ sin (t – π/2)

e = e₀ sin (t + π)

I = I₀ sin (t + π/2)

φ = 90

(3) PURE CAPACITORS

e = e₀ sin (t – π/2)

I = I₀ sin t

e = e₀ sin (t + π)

I = I₀ sin (t + 3π/2)

φ = 90

Current leads voltage.

Voltage leads currents.