Explain electrical properties of solids., Chemistry

Assignment Help:

On the basis of electrical conductivity the solids can be broadly classified into three types:

(a) Metals

(b) Insulators

(c) Semiconductors

Electrical conductivity of metals is very high and is of the order of 104 to 107 ohm-1 while that of insulators is one of the order of 10-20 to 10-10 ohm-1 m-1. Semiconductors have intermediate conductivity which lays in the range 10-8 to 104 ohm-1 m-1.

Electrical conductivity of solids may arise through the motion of electrons and positive holes (electronic conductivity) or through the motion of ions (ionic conductivity). The conduction through positive holes is called n-type conduction and through positive holes is called-type conduction. Electrical conductivity of metals is due to motion of electrons and it increases with the number of electrons available to participate in the conduction process. Pure ionic solids are those where conduction can take place only from motion of ions are insulators. Though, the presence of defects in the crystal structure raises their conductivity.

Unlike metals, the conductivity of semiconductors and insulators is mainly due to the presence of interstitial electrons and positive holes in the solids due to imperfections. The conductivity of semiconductors and insulators increases with increase in temperature whereas that of metals decreases.

 

 


Related Discussions:- Explain electrical properties of solids.

Purification of raw water for domestic use, Purification of raw water for d...

Purification of raw water for domestic use involve following process: (1)         SCREENING: T he raw water is passed through screens having large number of holes where floati

Bohr''s model can explain, Bohr's model can explain : (1) The spectrum o...

Bohr's model can explain : (1) The spectrum of hydrogen atom only    (2) Spectrum of atom or ion containing one electron only  (3) The spectrum of hydrogen molecule  (4

The number of electrons which can be accommodated an orbital, The number of...

The number of electrons which can be accommodated in an orbital is: (1) One        (2) Two            (3) Three              (4) Four Ans: Two

CHEMICAL ANALYSIS, I WANT TO DISCUSS ABOUT IRON CHEMICAL ANALYSIS.POSSIBLE ...

I WANT TO DISCUSS ABOUT IRON CHEMICAL ANALYSIS.POSSIBLE THAT?.

What is the charge on edta ligand?, EDTA charge is 4.and it is react with m...

EDTA charge is 4.and it is react with many compound to form other compounds

Relative strength of the bases, Relative strength of the bases (Basic natur...

Relative strength of the bases (Basic nature of -NH2) The dissimilarity in base strength in several amines can be described on the basis of inductive effect. The +I effect incr

P block, why ionisation energy of aluminium is greater then Ga?

why ionisation energy of aluminium is greater then Ga?

The number of orbitals in 2p sub-shell is, The number of orbitals in 2p  s...

The number of orbitals in 2p  sub-shell is : (1) 6        (2) 2        (3) 3        (4) 4 Ans: 3

Electron density vs internuclear distance, Electron density vs internuclear...

Electron density vs internuclear distance   Electronic density

The solvent power of carbon dioxide, Calculate the pressures required to ac...

Calculate the pressures required to achieve a density of 220 g dm -3 , 330 g dm -3 , and 440 g dm -3 at temperatures of 305 K and 350 K.   Properties, like the solvent powe

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