We must be able to display the magnetic topology and curlEto treat a given problem, in agreement with Faraday's law ∇×E=−∂B/∂t. In the integral form, the line integral ofEaround a closed contour generates the emf.
We also present some exact results on the influence of a finite electric field on the resistance for D=l, where the mean resistance crosses-over from the exponential-to a power-law, while the distribution tends asymptotically to a Poissonian form. Finally, we reformulate the problem of ...