Why does resistivity increase with temperature in metals?
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we have formula
resistivity=m/ne^T
where m= mass of electron
n=number density of electrons
e=charge of electron
T=relaxation time
we know that as temperature increases relaxation time decreases
hence relaxation time is inversely proportional to both temperature as well as resistivity
as a result resistivity and temperature becom directly proportional hence resistivity increases with teamperature
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