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!
Question:
a) Describe two mechanisms by which electrons can be excited from the valence band to the conduction band?
b) Given that the direct-band gap energy for Gallium Nitride (GaN) is 3.4 eV at room temperature, calculate the phonon energy and phonon momentum that you can expect from such a material with a lattice constant of 3.186 Å and velocity of sound of 5x103 m/s.
c) Given a P-type semiconductor with NA and ND atom concentrations of 8x1011 cm-3 and 3x103 cm-3 respectively, calculate the electron concentration assuming ni = 1.4x1010 cm-3.
d) What do you understand by the Fermi Level of a crystal? According to the Fermi-Dirac function, what is the temperature at which there is 1% probability that a state, with an energy 0.5 eV above the Fermi energy, will be occupied by an electron?
e) Given a piece of N-type silicon at 0 ºC,
i. Calculate the thermal velocity of an electron with an effective mass of 1.18m0 and a mobility of 0.25 m2V-1s-1.
ii. What is the electric field that needs to be applied to make the electron drift at a velocity of 1000 ms-1?
details
Consider the following mechanical system: a) Write a differential equation that describes the motion for this system. b) Take the Laplace transform of this equation and
Q. A synchronous motor operates continuously on the following duty cycle: 50 hp for 8 min, 100 hp for 8 min, 150 hp for 10 min, 120 hp for 20 min, and no load for 14min. Specify th
Ask questiwe have half wave rectifier connected to a dc motor load. by using a step down transformer from 8 to 1. by modalization we have the Primary Winding resistance is Rp=50 oh
Q. Show the r’s Complement? Step1- get the (r-1)'s complement Step 2- add 1 to the result ex. 935 10 9 9 9
Normal 0 false false false EN-IN X-NONE X-NONE
use of ranging and attenuator circuit
NOP No Operation Instruction No operation is performed when this instruction is executed. The instruction format is NOP All registers and flags re
A copper cylinder 40 cm diameter and 10 mm thick is nearly wound with a layer of 4mm diameter steel wire under a tensile stress of 80 Mpa. If the steam under a pressure of 5 Mpa is
Q. Explain the conditions to be satisfied for sustained oscillations in an oscillator circuit with the help of block diagram. The essential condition for sustained oscillations
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