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.

Electrochemistry, positive standard electrode potential and negetive standa...

positive standard electrode potential and negetive standard electrod potential

Properties of catechol - hydrocarbon, Properties of Catechol 1. Catecho...

Properties of Catechol 1. Catechol is a colourless crystalline solid, its melting points is 105°C. 2. Catechol is soluble in water. 3. Catechol is exaggerated on exposure

Resonance, what are the applications of resonance effect

what are the applications of resonance effect

F block elements, why f elememnts kept sepertaly in periodic table

why f elememnts kept sepertaly in periodic table

EDTA, describe any three types of EDTA titrations.

describe any three types of EDTA titrations.

Determine the number of neutrons, Q. Determine the Number of neutrons? ...

Q. Determine the Number of neutrons? Isotopes of an element can as well be specified by writing the mass number of the isotope following a hyphen after the name of the element.

Diagonal relationship, why beryllium show simmillarity with Alumminium

why beryllium show simmillarity with Alumminium

Diagonal relationship, what is diagonal relationship? explain diagonal rela...

what is diagonal relationship? explain diagonal relationship between Li and M g, Be and Al?

What are the types of emulsions, Q. What are the types of emulsions? Em...

Q. What are the types of emulsions? Emulsions can be of three types: 1) Temporary emulsion: These require vigorous shaking just before they are used, as they separate out e

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