> A nonlinear ϕ-q curve will always have a positive, albeit variable slope. However, the ratio of ϕ to q still has the units of ohm, without a phase shift, maki

> A nonlinear ϕ-q curve will always have a positive, albeit variable slope. However, the ratio of ϕ to q still has the units of ohm, without a phase shift, making this a nonlinear resistor. I think this is false. A nonlinear ϕ-q curve will yield a resistance which depends on time in a manner that can't be described by a single nonlinear v-i curve.