Explain the energy bands in solids, Electrical Engineering

Assignment Help:

Explain the energy bands in solids.

There are as several energy bands in a solid as there are energy levels in the parent atoms.

Many electrical properties of significance to engineers and scientists are associated to the upper band of energy levels and to be exact the upper two termed as the conduction band and the valance band. The valence bands have energies of similar level as those of valence electrons. Electrons in such band are in effect attached to particular atoms and thus not free to move about.

The conduction band energies are high adequate therefore electrons attaining these levels of energy are loosely attached to particular atoms or practically free such as they could easily move under the affect of an electric field. Electrons in the valence band can leave their band to join the conduction band when given adequate energy to jump the forbidden energy band (energy gap, as Eg). The size of Eg is a prime factor in determining whether a solid is a semiconductor, an insulator, or a conductor.


Related Discussions:- Explain the energy bands in solids

For sign flag , For Sign Flag  CP ( Call on plus ) CM (Call on minus ...

For Sign Flag  CP ( Call on plus ) CM (Call on minus ) Instruction CP call  the subroutine  from the  specified  memory  location if  sign flag is not set or reset( S=0)

Conditional call instruction, Conditional Call Instruction Similar  to ...

Conditional Call Instruction Similar  to conditional  jump  instructions there are conditional call  instructions  also based on various  flags.

Electronics, determine mimimum SOP for the following swiching funcion using...

determine mimimum SOP for the following swiching funcion using K-map: F(x1,x2,x3,x4)=Summationof m(4,6,8,10,11,12,15)+DC(3,5,7,9)

Schematic diagram of led based system, Q. Schematic Diagram of LED based Sy...

Q. Schematic Diagram of LED based System ? As shown in the two schematic diagrams above, the LEDs in a seven-segment display are not isolated from each other. Rather, eith

Explain how materials can be classified in three groups, Explain how materi...

Explain how materials can be classified into three groups on the basis of atomic structure. An atom has a positively charged nucleus surrounded through a group of negatively ch

Explain soft magnetic materials, Explain Soft magnetic materials. So...

Explain Soft magnetic materials. Soft magnetic materials -They contain small enclosed area of hysteresis loop, high permeability low eddy current losses and high saturation

Realize the function f by a k map using 0s, Q. Given the following truth ta...

Q. Given the following truth table: (a) Realize the function f by a K map using 0s. (b) Realize the function f by a K map using 1s.

Common drain amplifier, Common Drain Amplifier In electronics, a comm...

Common Drain Amplifier In electronics, a common-drain amplifier, as well termed as a source follower, is one type of three basic single-stage field effect transistor (FET) am

Regions of operation in bjt, Q. Regions of operation in BJT ? Transisto...

Q. Regions of operation in BJT ? Transistor find many applications like amplifier, switch etc. depending upon the polarity and the magnitude of the applied voltages across the

How phase angle measurement are carried out, Q.   Explain how phase angle m...

Q.   Explain how phase angle measurement are carried out with vector impedance meter.     Sol. Impedance measurements are concerned with both the magnitude (Z) and the phase

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