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!
Explain Einstein relation.
Einstein relation:
There exists a significant relation between the diffusion constant and the mobility. It is termed as the Einstein relation and may be deduced as given below:
Consider a semiconductor wherein there exists an electric field Ex and a concentration gradient as the current is zero. In these conditions the system is in the Boltzmann statistics and thermal equilibrium applies. Consider a potential V(x) producing at x an electric field E(x)= -dV/dx.
For the density of holes the Boltzmann expression as a function of x in thermal equilibrium is as
p(x) = Ce-eV/KT
Here C is a constant.
Therefore the gradient of the hole density is given by
dp/dx = (-e/KT)p.(dv/dx)
= (e/KT)p.E
The hole current vanishes in thermal equilibrium. Therefore,
O=peup Ex-eDp dp/dx
=peup Ex-(e2 /KT)Dp . Ex
Dp = (KT/e) Up (i.e. the Einstein relation).
Q. Working of self - excited generators? For self-excited generators, residual magnetism must be present in the ferromagnetic circuit of the machine in order to start the self-
what is emitter efficiency
Ask question #Minimum mechanism of microwave communication 100 words accepted#
Question: (a) Describe the term "Pure Hardware Delay" in microcontroller design. (b) Name the three types of subroutines which are placed at the interrupt location in ROM a
How single stepping can be done in 8086? By setting the Trace Flag (TF) the 8086 goes to single-step mode. In this mode, after the implementation of every instruction s 8086 ge
The energy consumption for a small factory is given at the end of the brief. a) Three commercial tariffs from an energy supplier are shown below. Using these (or other commercia
a) Write short notes on part feeding devices and transfer mechanism. b) Explain with example automation for machining operation with relevant diagrams. c) discuss different p
Explain what is Linker? Linker: A huge program is divided in smaller programs termed as modules. A linker is a program that links smaller programs together to by a large prog
A pure sine wave along with a frequency of 100Hz is sampled at 150Hz. At which point one of the subsequent frequencies would you expect an alias? A) 75Hz B) 100Hz C) 150Hz
WRITE THE PROCEDURE CONDUCT OC AND SC TEST OF AN ALTERNATOR TO FIND SYNCHRONOUS IMPEDENCE
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