Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Classify the materials based on the energy bands and explain them.
Classification of materials based on energy bands:
With reference to various band structures demonstrated in figure below we can generally divide solid in semiconductors, insulators and conductors. Conductors have many of electrons in the conduction band at room temperature. There no energy gaps exist and the valence and conduction bands overlap.
Insulator is a material wherein the energy gap is too large that practically no electron can be given sufficient energy to jump that gap.
These materials might conduct little electricity when their temperature is raised to very high values enabling some electrons to join the conduction band. A semiconductor is a solid along with an energy gap small sufficient for electron to cross simply from the valence band to the conduction bands. At room temperature adequate energy is available for valence electrons to bridge the energy gap to the conduction band; therefore the material sustains a few electric current.
The energy distribution of electrons in a solid are governed through the laws of Fermi - Dirac statistics.
The Fermi level is that at any temperature, the no. of electrons along with greater energy than the Fermi energy is equivalent to the number of unoccupied energy levels lower than it. In conductors, the Fermi level is put in a permitted band because the valence band and conduction band overlap with no energy gap. In insulators, this lies in the centre of the large energy gap whereas in semiconductors this lies in the relatively small energy gap.
can you let me know how much it would be for the answer to a question that has 2 parts
What are the 8086 interrupt types? Dedicated interrupts Type 0: Divide by zero interrupt Type 1: Single step interrupt Type 2:Non maskable interrupt Type 3: Breakpo
Passive filters: Passive implementations of linear filters are based upon combinations of inductors (L), resistors (R), and capacitors (C). These sorts are collectively termed
Q. On a per-phase basis, let v = √2 V cos ωt and i = √2 I cos (ωt - θ). (a) Express the instantaneous power s(t) in terms of real power P and reactive power Q. (b) Now consid
What are the advantages of modern ac generators and Integrated Drive Generators? There are two questions here. I''d really like it if somebody could help me. I''m an AE student.
Write a program to count how many from your data set called MYDATA, which is a set of signed single-byte numbers, has positive value and are odd numbers. Save the result in POSOD
Antenna Fundamentals We shall discuss here only the fundamental concepts needed to understand the role of an antenna as a power-coupling element of a system. Figure illustrates
Explain cascading of multiple PICS 8259. The 8259A adds 8 vectored priority encoded interrupts to the microprocessor. It can be expanded to 64 interrupt requests by using one
how does Proportional band affect the performance of control system?
In the magnetic circuit shown in Figure (a) the coil of 500 turns carries a current of 4 A. The air-gap lengths are g 1 = g 2 = 0.25 cm and g 3 = 0.4 cm. The cross-sectional are
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd