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

Bioinorganic chemistry, BIOINORGANIC CHEMISTRY Life is sometimes thought...

BIOINORGANIC CHEMISTRY Life is sometimes thought of as 'carbon chemistry', but around 25 components are essential for life. It is normal to divide these into trace elements an

Physical properties of phenol, Physical properties of Phenol (a) Phenol...

Physical properties of Phenol (a) Phenol is a colorless crystalline, deliquescent solid. It attains pink colour on exposure to air and light. (b) Phenol is capable of formin

Reversible and irreversible cells for asssignment, REVERSIBLE CELLS AND IRR...

REVERSIBLE CELLS AND IRREVERSIBLE CELLS DEFINITION, TYPES, CLASSIFICATION, REACTION AND DIFFERENCES

The energy of covalent o-h, Bond energy of covalent O-H  bond in water is: ...

Bond energy of covalent O-H  bond in water is: (1) Greater than bond energy of H bond (2) Equal to bond energy of H bond (3) Less than bond energy of H bond (4) None o

Organic chemistry, laboratory preparation, chemical properties and uses of ...

laboratory preparation, chemical properties and uses of methylamine, benzamide and benzoic acid

Matter, why the water is compound

why the water is compound

Metallurgy, Al is used as reducing agent for the extraction of metals such ...

Al is used as reducing agent for the extraction of metals such as Chromium,Monganes.Explain why? Solution) Al3+ + 3 e- Al Good reducing agents like aluminum have relatively

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