Resistance?

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Boris Lagutin
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Joined: Thu Aug 28, 2014 9:17 pm
Location: USA

Resistance?

Postby Boris Lagutin » Mon Apr 27, 2015 2:31 am

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.
Boris Lagutin
student

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joe
Posts: 745
Joined: Fri Aug 29, 2003 11:57 am
Location: Sydney

Re: Resistance?

Postby joe » Mon Apr 27, 2015 4:15 pm

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


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