The classical free electron theory, Electrical Engineering

The free electron theory of metals was first proposed by Drude and later improved by Lorentz. The main postulates of this theory are

1.       All metal contain, adequate number of valence electron forming an electron gas which is free to move throughout the volume of the metal. A metal can be regarded as an array of positive ions permeated by a gas of free electrons.

2.  The electron velocities in metals obey the classical Maxwell-Boltzmann distribution of velocities.

3.  In the absence of an electric field the electrons move in random directions, making collisions from time to time with positive ions. Which are fixed in lattice.

4.  The free electrons in the electron gas wander freely in the metal without any mutual interation. 6.  When an electric field is applied to the free electrons are accelerated. They move in opposite direction to the electric field while maintaining their random motion.


Posted Date: 7/2/2012 10:02:00 PM | Location : United States

Related Discussions:- The classical free electron theory, Assignment Help, Ask Question on The classical free electron theory, Get Answer, Expert's Help, The classical free electron theory Discussions

Write discussion on The classical free electron theory
Your posts are moderated
Related Questions
Explain explanatory notes on A/D conversion. The digital inventory is working a revolution into the field of microcontrollers, technology and microprocessors are used more effi

Explain the Synchronous Machines? A synchronous machine, unlike an induction (or asynchronous) machine, only develops torque at a fixed, so called, synchronous speed - n s whi

Q A residence is supplied with a voltage v(t) = 110√2cos120πt Vand a current i(t) = 10√2cos120πt A. If an electricmeter is used tomeasure the average power, find the meter reading,

A method used in advanced microprocessors where the microprocessor begins implementing a second instruction before the first has been done. That is, various instructions are in the

Unconditional Return RET Instruction: This  instruction is used to transfer the program sequence  from subroutine to the calling  program unconditionally. The instruction forma

Q. Consider the dual-slope A/D converter of Figure. (a) Calculate the total charge on the integrator due to the input voltage Vin during the signal integration time T. (b) Ob

what is one common applicable for CB amplifier

Structure and use of PNP transistor: The figure opposite is a schematic presentation of a PNP transistor related to two voltage sources. To construct the transistor conduct ap

What is a coprocessor? It is a specially designed microprocessor which take care of mathematical calculations including integer and floating point data .it is intended to work