How does the resistance depends on the temperature?
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The more these atoms and molecules bounce around, the harder it is for the electrons to get by. Thus, resistance generally increases with temperature. For small temperature changes the resistivity varies linearly with temperature: r = ro (1 + a DT), where a is the temperature coefficient of resistivity.
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As the temperature rises , the number of phonon increase and with it the likelihood that the electrons and phonons will collide . When temperature goes up , resistance goes up. for some materials, resistivity is a linear function of temperature...The resistivity of a conductor increase with temperature.....
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