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authorTrupti Kini2016-10-22 23:30:44 +0600
committerTrupti Kini2016-10-22 23:30:44 +0600
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A Solid_State_Physics_by_Dr._M._Arumugam/Chapter1.ipynb A Solid_State_Physics_by_Dr._M._Arumugam/Chapter10.ipynb A Solid_State_Physics_by_Dr._M._Arumugam/Chapter11.ipynb A Solid_State_Physics_by_Dr._M._Arumugam/Chapter12.ipynb A Solid_State_Physics_by_Dr._M._Arumugam/Chapter13.ipynb A Solid_State_Physics_by_Dr._M._Arumugam/Chapter14.ipynb A Solid_State_Physics_by_Dr._M._Arumugam/Chapter2.ipynb A Solid_State_Physics_by_Dr._M._Arumugam/Chapter3.ipynb A Solid_State_Physics_by_Dr._M._Arumugam/Chapter4.ipynb A Solid_State_Physics_by_Dr._M._Arumugam/Chapter5.ipynb A Solid_State_Physics_by_Dr._M._Arumugam/Chapter6.ipynb A Solid_State_Physics_by_Dr._M._Arumugam/Chapter8.ipynb A Solid_State_Physics_by_Dr._M._Arumugam/screenshots/22.png A Solid_State_Physics_by_Dr._M._Arumugam/screenshots/33.png A Solid_State_Physics_by_Dr._M._Arumugam/screenshots/44.png A basic_electrical_engineering_by_nagsarkar_and_sukhija/Chapter2_g1CooCv.ipynb A basic_electrical_engineering_by_nagsarkar_and_sukhija/Chapter4_y6WvPya.ipynb A basic_electrical_engineering_by_nagsarkar_and_sukhija/Chapter5_8YQCBnu.ipynb A basic_electrical_engineering_by_nagsarkar_and_sukhija/chapter11_KNhAPle.ipynb A basic_electrical_engineering_by_nagsarkar_and_sukhija/chapter1_UaQSIvn.ipynb A basic_electrical_engineering_by_nagsarkar_and_sukhija/chapter3_2.ipynb A basic_electrical_engineering_by_nagsarkar_and_sukhija/chapter6_xg51MMS.ipynb A basic_electrical_engineering_by_nagsarkar_and_sukhija/chapter7_sTn1O6Y.ipynb A basic_electrical_engineering_by_nagsarkar_and_sukhija/chapter8_wAsDeY9.ipynb A basic_electrical_engineering_by_nagsarkar_and_sukhija/chapter9_NbF92Qt.ipynb A basic_electrical_engineering_by_nagsarkar_and_sukhija/screenshots/chap1_Ux1JjUJ.png A basic_electrical_engineering_by_nagsarkar_and_sukhija/screenshots/chapter2_jrlMSB1.png A basic_electrical_engineering_by_nagsarkar_and_sukhija/screenshots/chapter6_HJhQnZO.png
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+{
+ "cells": [
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "# 1: Bonding in Solids"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example number 1, Page number 1.21"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 6,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "-2*a/r**3 + 90*b/r**11\n"
+ ]
+ }
+ ],
+ "source": [
+ "#importing modules\n",
+ "import math\n",
+ "from __future__ import division\n",
+ "from sympy import *\n",
+ "import numpy as np\n",
+ "\n",
+ "#Variable declaration\n",
+ "n=1;\n",
+ "m=9;\n",
+ "a=Symbol('a')\n",
+ "b=Symbol('b')\n",
+ "r=Symbol('r')\n",
+ "\n",
+ "#Calculation\n",
+ "y=(-a/(r**n))+(b/(r**m));\n",
+ "y=diff(y,r);\n",
+ "y=diff(y,r);\n",
+ "\n",
+ "#Result\n",
+ "print y"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 8,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "young's modulus is 157 GPa\n"
+ ]
+ }
+ ],
+ "source": [
+ "#since the values of a,b,r are declared as symbols in the above cell, it cannot be solved there. hence it is being solved here with the given variable declaration\n",
+ "#importing modules\n",
+ "import math\n",
+ "from __future__ import division\n",
+ "\n",
+ "#Variable declaration\n",
+ "a=7.68*10**-29; \n",
+ "r0=2.5*10**-10; #radius(m)\n",
+ "\n",
+ "#Calculation\n",
+ "b=a*(r0**8)/9;\n",
+ "y=((-2*a*r0**8)+(90*b))/r0**11; \n",
+ "E=y/r0; #young's modulus(Pa)\n",
+ "\n",
+ "#Result\n",
+ "print \"young's modulus is\",int(E/10**9),\"GPa\""
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example number 2, Page number 1.22"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 9,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "effective charge is 0.72 *10**-19 coulomb\n",
+ "answer given in the book is wrong\n"
+ ]
+ }
+ ],
+ "source": [
+ "#importing modules\n",
+ "import math\n",
+ "from __future__ import division\n",
+ "\n",
+ "#Variable declaration\n",
+ "dm=1.98*10**-29/3; #dipole moment\n",
+ "l=0.92*10**-10; #bond length(m)\n",
+ "\n",
+ "#Calculation\n",
+ "ec=dm/l; #effective charge(coulomb)\n",
+ "\n",
+ "#Result\n",
+ "print \"effective charge is\",round(ec*10**19,2),\"*10**-19 coulomb\"\n",
+ "print \"answer given in the book is wrong\""
+ ]
+ }
+ ],
+ "metadata": {
+ "kernelspec": {
+ "display_name": "Python 2",
+ "language": "python",
+ "name": "python2"
+ },
+ "language_info": {
+ "codemirror_mode": {
+ "name": "ipython",
+ "version": 2
+ },
+ "file_extension": ".py",
+ "mimetype": "text/x-python",
+ "name": "python",
+ "nbconvert_exporter": "python",
+ "pygments_lexer": "ipython2",
+ "version": "2.7.11"
+ }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}