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, The emf of the cell Cd/CdSO4(0.0093M)//CdSO4/Cd is 0.086...

The emf of the cell Cd/CdSO4(0.0093M)//CdSO4/Cd is 0.086V at 25°C find the value of X solution

The amino acid glutamine , The amino acid glutamine can be produced bythe f...

The amino acid glutamine can be produced bythe following equilibrium in the presence of a suitable catalyst.  The equilibrium constant for this reaction is 3.5 x 10-3 at 25 oC.

A covalent bond between two elements, A covalent bond is likely to be form...

A covalent bond is likely to be formed between two elements which: (1) Have similar electronegativities (2) Have low ionization energies (3) Have low melting points (4

What is function group, An atom or group of atoms, which verify the charact...

An atom or group of atoms, which verify the characteristic properties of the Substance it, is known as functional group.

Antifertility drugs, what is antifertility drugs ? definition with example

what is antifertility drugs ? definition with example

Evaluate percentage fat content in milk, Q. Evaluate percentage Fat Content...

Q. Evaluate percentage Fat Content in Milk? The fat content in milk can be determined through various procedures as: Direct determination of fat by extraction with ether - A

Explain protonation, Explain Protonation Protonation of the ring double...

Explain Protonation Protonation of the ring double bond gives a tertiary carbocation that reacts with the carbonyl oxygen of the ester to give the lactone.

Endothermic Reaction, Why is ATP considered an endothermic reaction ?

Why is ATP considered an endothermic reaction ?

Pauli''s exclusion principle, Pauli's exclusion principle states that : ...

Pauli's exclusion principle states that : (1) Nucleus of an atom contains no negative charge   (2) Electrons move in circular orbits around the nucleus   (3) Electrons oc

Sum of its enthalpy, What is basically Gibb''s free energy change? Ans) Th...

What is basically Gibb''s free energy change? Ans) The energy associated with a chemical reaction that can be used to do work.  The free energy of a system is the sum of its entha

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