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

Reaction during electrovalent bond formation, The main reaction during elec...

The main reaction during electrovalent bond formation is: (1) Redox reaction (2) Substitution reaction  (3) Addition reaction (4) Elimination reaction Ans: Redox re

Physical properties of glucose, Physical properties of Glucose 1. Gluco...

Physical properties of Glucose 1. Glucose is a colourless crystalline solid, melts at 146° C. 2. Glucose is readily soluble in water. 3. From aqueous solution,Glucose se

13mg of Mg in 4.2mL of HCl, How long would it take to consume 13mg of Mg in...

How long would it take to consume 13mg of Mg in 4.2mL of 1.25M HCl?

Electrochemistry, Q. Describe Electrochemistry Electricity (i.e., elect...

Q. Describe Electrochemistry Electricity (i.e., electric current) is a flow of electric charges. In metals, it is the flow of electrons. In electrolytes, it is the mov

How do we measure food texture, Q. How do we measure food texture? Foo...

Q. How do we measure food texture? Food texture can be evaluated by mechanical test or instrumental methods. This is called as objective evaluation. When we use the human sens

practical, How can you identify the phenolic-OH gr. of an organic compound...

How can you identify the phenolic-OH gr. of an organic compound which also contain an electron withdrawing group?

Purification of organic compounds., How will do project work on purificatio...

How will do project work on purification of organic compounds by crystalization and distillation from water and alcohol?

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