From 6279fa19ac6e2a4087df2e6fe985430ecc2c2d5d Mon Sep 17 00:00:00 2001 From: kinitrupti Date: Fri, 12 May 2017 18:53:46 +0530 Subject: Removed duplicates --- .../Chapter12.ipynb | 285 --------------------- 1 file changed, 285 deletions(-) delete mode 100755 backup/Modern_Physics_By_G.Aruldas_version_backup/Chapter12.ipynb (limited to 'backup/Modern_Physics_By_G.Aruldas_version_backup/Chapter12.ipynb') diff --git a/backup/Modern_Physics_By_G.Aruldas_version_backup/Chapter12.ipynb b/backup/Modern_Physics_By_G.Aruldas_version_backup/Chapter12.ipynb deleted file mode 100755 index b3818649..00000000 --- a/backup/Modern_Physics_By_G.Aruldas_version_backup/Chapter12.ipynb +++ /dev/null @@ -1,285 +0,0 @@ -{ - "metadata": { - "name": "", - "signature": "sha256:881432a5cd98267b92bdfa11e021925fdef61ae98abdadccafbf254c6f9ca038" - }, - "nbformat": 3, - "nbformat_minor": 0, - "worksheets": [ - { - "cells": [ - { - "cell_type": "heading", - "level": 1, - "metadata": {}, - "source": [ - "12: Band theory of solids" - ] - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example number 12.1, Page number 243" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "#importing modules\n", - "import math\n", - "from __future__ import division\n", - "\n", - "#Variable declaration\n", - "EF=8; #fermi energy(eV)\n", - "e=1.6*10**-19; #conversion factor from J to eV\n", - "m=9.1*10**-31; #mass of electron(kg)\n", - "\n", - "#Calculation\n", - "E0bar=3*EF/5; \n", - "v=math.sqrt(2*E0bar*e/m); #speed of electron(m/s)\n", - "\n", - "#Result\n", - "print \"speed of electron is\",round(v/10**6,1),\"*10**6 m/s\"" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "speed of electron is 1.3 *10**6 m/s\n" - ] - } - ], - "prompt_number": 3 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example number 12.2, Page number 244" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "#importing modules\n", - "import math\n", - "from __future__ import division\n", - "\n", - "#Variable declaration\n", - "I=8; #current(ampere)\n", - "r=9*10**-4; #radius(m)\n", - "V=5; #potential difference(V)\n", - "L=1; #length(m)\n", - "\n", - "#Calculation\n", - "A=math.pi*r**2; #area of wire(m**2)\n", - "E=V/L;\n", - "J=I/A; #current density(V/m)\n", - "rho=E/J; #resistivity(ohm m)\n", - "\n", - "#Result\n", - "print \"current density is\",round(J/10**6,3),\"*10**6 V/m\"\n", - "print \"resistivity is\",round(rho*10**6,2),\"*10**-6 ohm m\"" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "current density is 3.144 *10**6 V/m\n", - "resistivity is 1.59 *10**-6 ohm m\n" - ] - } - ], - "prompt_number": 6 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example number 12.3, Page number 245" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "#importing modules\n", - "import math\n", - "from __future__ import division\n", - "\n", - "#Variable declaration\n", - "n=1;\n", - "a=4*10**-10; #lattice parameter(m)\n", - "N=1.56*10**28; \n", - "e=1.6*10**-19; #conversion factor from J to eV\n", - "tow=10**-15; #collision time(s)\n", - "m=9.1*10**-31; #mass of electron(kg)\n", - "\n", - "#Calculation\n", - "N=n/(a**3); #number of electrons per unit volume(per m**3)\n", - "sigma=N*e**2*tow/m; #conductivity(per ohm m)\n", - "rho=1/sigma; #resistivity(ohm m)\n", - "\n", - "#Result\n", - "print \"conductivity is\",round(sigma/10**6,2),\"*10**6 ohm m\"\n", - "print \"resistivity is\",rho,\"ohm m\"" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "conductivity is 0.44 *10**6 ohm m\n", - "resistivity is 2.275e-06 ohm m\n" - ] - } - ], - "prompt_number": 8 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example number 12.4, Page number 247" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "#importing modules\n", - "import math\n", - "from __future__ import division\n", - "\n", - "#Variable declaration\n", - "k=1.38*10**-23; #boltzmann constant(J/K)\n", - "NA=6.02*10**26; #avagadro number(k/mole)\n", - "T=300; #temperature(K)\n", - "EF=2; #fermi energy(eV)\n", - "e=1.6*10**-19; #conversion factor from J to eV\n", - "\n", - "#Calculation\n", - "C=math.pi**2*k**2*NA*T/(2*EF*e); #electronic specific heat(J/kmol/K)\n", - "\n", - "#Result\n", - "print \"electronic specific heat is\",int(C),\"J/kmol/K\"" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "electronic specific heat is 530 J/kmol/K\n" - ] - } - ], - "prompt_number": 10 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example number 12.5, Page number 247" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "#importing modules\n", - "import math\n", - "from __future__ import division\n", - "\n", - "#Variable declaration\n", - "K=327; #thermal conductivity(W/mK)\n", - "T=300; #temperature(K)\n", - "rho=7.13*10**3; #density(kg/m**3)\n", - "NA=6.02*10**26; #avagadro number(k/mole)\n", - "w=65.38; #atomic weight\n", - "e=1.6*10**-19; #conversion factor from J to eV\n", - "tow=2.5*10**-14; #relaxation time(s)\n", - "m=9.1*10**-31; #mass of electron(kg)\n", - "\n", - "#Calculation\n", - "N=2*rho*NA/w; #number of electrons per unit volume(per m**3)\n", - "sigma=N*e**2*tow/m; #conductivity(per ohm m)\n", - "L=K/(sigma*T); #lorentz number(W ohm/K**2)\n", - "\n", - "#Result\n", - "print \"lorentz number is\",round(L*10**8,4),\"*10**-8 W ohm/K**2\"" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "lorentz number is 1.1804 *10**-8 W ohm/K**2\n" - ] - } - ], - "prompt_number": 12 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example number 12.6, Page number 248" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "#importing modules\n", - "import math\n", - "from __future__ import division\n", - "\n", - "#Variable declaration\n", - "e=1.6*10**-19; #conversion factor from J to eV\n", - "n=5*10**28; #number of atoms(/m**3)\n", - "\n", - "#Calculation\n", - "RH=-1/(n*e); #hall coefficient(m**3/C)\n", - "\n", - "#Result\n", - "print \"hall coefficient is\",round(RH*10**9,3),\"*10**-9 m**3/C\"" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "hall coefficient is -0.125 *10**-9 m**3/C\n" - ] - } - ], - "prompt_number": 14 - } - ], - "metadata": {} - } - ] -} \ No newline at end of file -- cgit