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.

Determine about the silicate clays, Determine about the silicate clays ...

Determine about the silicate clays The silicate clays develop charges because of an imbalance which takes place due to an exchange of one cation by the other in the crystal str

Polarity and salvation, Polarity and salvation   A solvent is a liqu...

Polarity and salvation   A solvent is a liquid medium in which dissolved are known as solutes. Solvents are useful for storing species that would otherwise be in inconvenien

Nitrogen, why nitrogen act as inert gas

why nitrogen act as inert gas

Crystals, what is a crystal and why do crystals have regular faces?

what is a crystal and why do crystals have regular faces?

D block elements, what is the general electronic configuration of d block e...

what is the general electronic configuration of d block element

Position isomerism - organic chemistry, Position isomerism: It is due ...

Position isomerism: It is due to the difference in the position of the substituent atom or group or an unsaturated linkage in similar carbon chain. A. Carboxylic, aldehydes

Sulphur in vapour state exhibits paramagnetic behaviour, Define the followi...

Define the following observations: (i) Most of the known noble gas compounds are those of xenon. (ii) CIF3 exists but FCI 3 does not. (iii) Between the hydrides of elemen

A cyclic ester, The lactone, a cyclic ester, can form an enolate ion, and t...

The lactone, a cyclic ester, can form an enolate ion, and this ion is alkylated by methyl iodide.

Explain salt bridge with its functions., Salt bridge is a U-shaped tube con...

Salt bridge is a U-shaped tube containing a semi-solid paste of some inert electrolyte like  KCl, KNO 3 , NH 4 Cl,  etc. in agar-agar and gelatin. An inert electrolyte is one which

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