Thermal Resistance, Positive Temperature Particle, Skin Effect

It is likely that when an electron in a conductor is driven to high speed with an electric field, it goes into a helical path at some terminal velocity \(v\), at which the resultant force on the charge is zero.  If this is the case, the circular motion of the particle generates a temperature field \(E_T\) in the direction of travel given by the right hand screw rule.

Although spinning positive temperature particles present a electric field, it is first a temperature particle with an energy density, \(\psi\) around it.  This field repels positive temperature particles and other positive temperature field.  The electron thus experiences this temperature field as a retarding force against its direction of travel.

As temperature increases this retarding force increases.

Positive temperature particle is then the cause of thermal resistance in a conductor, impeding current flow.  This resistance increases with increasing temperature.

Since it is reasonable to expect that temperature of a wire conductor  to be higher at its core than its outer surface, this retarding force has a tendency to push the moving electrons to the outer surface.  This adds to the resistance of the conductor as the conducting cross section of the wire is effectively reduced.  And the conducting charges travel mainly on the skin of the conductor.  A phenomenon called skin effect.

Have a nice day.