Resistance?

[Boris Lagutin]

Could someone clarify how the process called "Resistance" happens in a resistor, for example, a filament in a bulb in detail? In other words, why does the speed of the current electrons slow down in the resistor (filament)? I would like to ask to explain this process in detail as far as possible to see general elements of the process. I mean I want to know why electrons slow down and emission of light and heat happens?

Thanks a lot.

[joe]

On average, the electrons don't slow down. Rather, resistance has the effect that a non-zero electric field is necessary to maintain an average speed. See the section on this in Physclips:
http://www.animations.physics.unsw.edu.au/jw/drift.html

The work done by that field on the electrons is turned into heat by interactions between the electrons and the lattice.

Joe