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

Insulation resistance, how can we increase insulation resistance of sheet

how can we increase insulation resistance of sheet

Ratio, how do ratos connect to engineering

how do ratos connect to engineering

Determine the fourier series for the periodic wave - forms, Q. Determine th...

Q. Determine the Fourier series for the periodic wave - forms given in Figure.

EMF, what is induced EMF & what is statically EMF explain in details.

what is induced EMF & what is statically EMF explain in details.

Create a time diagram - conveyer, When the PLC is in the RUN mode it will s...

When the PLC is in the RUN mode it will switch ON the conveyer so it will run continuously. This project is divided into four outcomes: (a)    Detect block on entry, close

Calculate the output torque, The power transferred across the air gap of a ...

The power transferred across the air gap of a two pole inductionmotor is 24 kW. If the electromag netic power developed is 22 kW, find the slip. Calculate the output torque if the

Total harmonic distortion, The site 450 kVA load is actually a three-phase,...

The site 450 kVA load is actually a three-phase, six pulse thyristor rectifier feeding a dc bus. Assuming that the voltage waveform at the site 11 kV bus is purely sinusoidal, calc

Resistors, Difference between linear and non-linear resistors

Difference between linear and non-linear resistors

L filters, L filters: An L filter contains two reactive elements that ...

L filters: An L filter contains two reactive elements that are one in series and one in parallel. T and π filters: Main article: Capacitor-input filter

Semiconductors, Charge density I n a semiconductor

Charge density I n a semiconductor

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