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

Determine the speed at which the machine runs as a motor, A 100-kW, dc shun...

A 100-kW, dc shunt generator, connected to a 220-V main, is belt-driven at 300 r/min, when the belt suddenly breaks and the machine continues to run as a motor, taking 10 kW from t

Interpreter- high level language, Interpreter- High level language T...

Interpreter- High level language The interpreter is a program  which  translates the high  level  program  into  objects  program  statement wise . it reads one statement of

Basic electromagnetic principles, It has been known for a thousand years or...

It has been known for a thousand years or more (originating in China) that certain (magnetic) materials would always orientate    themselves in a  particular direction if suspended

Instrumentation, explain measurement of frqueny and phase using cro

explain measurement of frqueny and phase using cro

Calculate the maximum analog output voltage, Q. For the 4-bit D/A converter...

Q. For the 4-bit D/A converter of Figure, calculate: (a) The maximum analog output voltage. (b) The minimum analog output voltage. (c) The smallest detectable analog outpu

Determine voltage on the self-biased n-channel, Measurements made on the se...

Measurements made on the self-biased n-channel JFET shown in Figure are V GS =-1 V, I D = 4 mA; V GS =-0.5V, I D = 6.25 mA; and V DD = 15 V. (a) Determine V P and I DSS .

What do you mean by conductors and insulators, Q. What do you mean by Condu...

Q. What do you mean by Conductors and Insulators? In order to put charge in motion so that it becomes an electric current, one must provide a path through which it can flow eas

Sod output - serial input output ports , SOD Output Serial output data ...

SOD Output Serial output data  single  bit can be sent  out through this pin using SIM  command  discussed in details in chapter8.

Illustrate gas power plant, With the help of schematic diagram illustrate G...

With the help of schematic diagram illustrate Gas Power Plant. Describe the effect of reheating, regeneration and inter cooling with the help of suitable T-S diagrams. Give the

Frequency Variation, Frequency variation in simple transmitters can be redu...

Frequency variation in simple transmitters can be reduced by adding a _______ stage.

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