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

Carbon is present as graphite in white cast iron , Cast iron is iron or a f...

Cast iron is iron or a ferrous alloy which has been heated until it liquefies, and is then poured into a mould to solidify. It is usually made from pig iron. The alloy constituents

Studen of university, application of matlab in analytical chemistry

application of matlab in analytical chemistry

Classification of dyes - ingrain dyes (developed dyes), Ingrain dyes (devel...

Ingrain dyes (developed dyes) - Ingrain dyes are those that are synthesised straight on the fabric. Instances of this type of dyes are azo dyes. In this the fabric is wrapped up

Describe about groups or families in periodic table, Q. Describe about grou...

Q. Describe about groups or families in periodic table? Every element may be represented by a one or two letter symbol. In the middle of nineteenth century a Russian chemist Dm

Drugs, what are antifertility drugs

what are antifertility drugs

Practicals, graph for the titration of barium chloride versus sodium sulpha...

graph for the titration of barium chloride versus sodium sulphate

Explain about the interstitial defects, Explain about the interstitial defe...

Explain about the interstitial defects An interstitial is an atom that occupies a place outside the normal lattice position. It might be the similar type of atom as the others

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