How do temperature affect electrical resistivity of metals, Chemistry

Assignment Help:

How do impurities and temperature affect electrical resistivity of metals?

Ans:

Temperature effect on resistivity:

Any increase in temperature of a conductor increases thermal agitation of metallic ions as they vibrate about their mean positions. This reduces the mean free path and restricts the flow of  electrons,  hence reducing  the  conductivity  of  material  and  increasing  its resistivity.

1590_chemistry.png

Ρt = Ρω [1+ α0 (t− 20)]
Ρt → resistivity at temperature
Ρ20 → resistivity at 200c.
α0 → Coefficient of temperature
Which is positive.

 


Related Discussions:- How do temperature affect electrical resistivity of metals

Chemical bonding, explain why carbon tetra-chloride does not dissolve in wa...

explain why carbon tetra-chloride does not dissolve in water?

RedOx titration, defining titration,Redox Titrations

defining titration,Redox Titrations

Alcohols, Preparation of dihydric alcohols

Preparation of dihydric alcohols

Which has highest second ionisation energy, Which has highest second ionisa...

Which has highest second ionisation energy? Electronic config of Na(+) is noble gas config. . so its very difficult to remove an electron so it will have very high 2nd ionisati

Bond making or breaking, can u tell me what happens with ionic compounds wh...

can u tell me what happens with ionic compounds when heat is given??

Structure of aldehydes and ketones, Structure of Aldehydes and Ketones ...

Structure of Aldehydes and Ketones Carbonyl carbon atom is connected to three atoms by sigma bonds. As these bonds use Sp 2 -orbitals, they found in the same plane and are 120°

D and f block, What happens when complex compounds consist of legand?

What happens when complex compounds consist of legand?

What is the foundation of cold and hot working, What is the foundation of c...

What is the foundation of classification of cold and hot working? Cold and hot working: Changing the shape of material by extrusion, forging, rolling, drawing involves pl

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd