77deuce

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Apr 6, 2016
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Resistance and temperature..

Does having a higher temperature in an electrical wire increase the resistance of a wire?
I know R=(roe)L/A.
An alternative answer choice (B) in this question made me wonder if temperature had an effect.
Screen Shot 2017-08-19 at 1.04.01 AM.png



Thanks~
 

Doogie.Howser

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Jun 6, 2017
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Yes. Increasing the temperature will also increase the resistance. The higher T has the atoms within the metal wire moving around and allowing them to collide with and slow down the flow of electrons that create the current. Higher T = higher R.
 
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aldol16

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Nov 1, 2015
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Yes. Increasing the temperature will also increase the resistance. The higher T has the atoms within the metal wire moving around and allowing them to collide with and slow down the flow of electrons that create the current. Higher T = higher R.
Not in all cases. It depends on the substance you're looking at and its so-called 'temperature coefficient of resistance': Temperature Coefficient of Resistance | Physics Of Conductors And Insulators | Electronics Textbook