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Diffstat (limited to 'Modern_Physics_By_G.Aruldas/Chapter13_1.ipynb')
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diff --git a/Modern_Physics_By_G.Aruldas/Chapter13_1.ipynb b/Modern_Physics_By_G.Aruldas/Chapter13_1.ipynb deleted file mode 100755 index 70f718e0..00000000 --- a/Modern_Physics_By_G.Aruldas/Chapter13_1.ipynb +++ /dev/null @@ -1,250 +0,0 @@ -{
- "metadata": {
- "name": "",
- "signature": "sha256:1e02413599230fcf3193c09944545ea5772a7d8e9a89055fec5a43dcb6e7435b"
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
- {
- "cells": [
- {
- "cell_type": "heading",
- "level": 1,
- "metadata": {},
- "source": [
- "13: Magnetic properties of solids"
- ]
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 13.1, Page number 256"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "chi=-4.2*10**-6; #magnetic susceptibility\n",
- "H=1.2*10**5; #magnetic field(A/m)\n",
- "mew0=4*math.pi*10**-7; #permitivity of free space(H/m)\n",
- "\n",
- "#Calculation\n",
- "M=chi*H; #magnetisation(A/m)\n",
- "B=mew0*(H+M); #flux density(T)\n",
- "mewr=(M/H)+1; #relative permeability\n",
- "\n",
- "#Result\n",
- "print \"magnetisation is\",M,\"A/m\"\n",
- "print \"flux density is\",round(B,3),\"T\"\n",
- "print \"relative permeability is\",round(mewr,6)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "magnetisation is -0.504 A/m\n",
- "flux density is 0.151 T\n",
- "relative permeability is 0.999996\n"
- ]
- }
- ],
- "prompt_number": 4
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 13.2, Page number 258"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "Z=2; #atomic number\n",
- "mew0=4*math.pi*10**-7; #permitivity of free space(H/m)\n",
- "e=1.6*10**-19; #conversion factor from J to eV\n",
- "m=9.1*10**-31; #mass of electron(kg)\n",
- "N=28*10**26; #number of atoms(per m**3)\n",
- "r=0.6*10**-10; #mean radius(m)\n",
- "\n",
- "#Calculation\n",
- "chi=-mew0*Z*e**2*N*r**2/(6*m); #diamagnetic susceptibility\n",
- "\n",
- "#Result\n",
- "print \"diamagnetic susceptibility is\",round(chi*10**8,3),\"*10**-8\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "diamagnetic susceptibility is -11.878 *10**-8\n"
- ]
- }
- ],
- "prompt_number": 7
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 13.3, Page number 259"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "n=2;\n",
- "a=2.55*10**-10; #lattice constant(m)\n",
- "chi=5.6*10**-6; #susceptibility\n",
- "Z=1;\n",
- "mew0=4*math.pi*10**-7; #permitivity of free space(H/m)\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",
- "N=n/(a**3); #number of electrons per unit volume(per m**3)\n",
- "rbar=math.sqrt(chi*6*m/(mew0*Z*e**2*N)); #radius of atom(m)\n",
- "\n",
- "#Result\n",
- "print \"radius of atom is\",round(rbar*10**10,3),\"angstrom\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "radius of atom is 0.888 angstrom\n"
- ]
- }
- ],
- "prompt_number": 9
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 13.4, Page number 260"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "mew0=4*math.pi*10**-7; #permitivity of free space(H/m)\n",
- "k=1.38*10**-23; #boltzmann constant(J/K)\n",
- "T=300; #temperature(K)\n",
- "N=6.5*10**25; #number of atoms(per m**3)\n",
- "mew=9.27*10**-24; \n",
- "\n",
- "#Calculation\n",
- "chi=mew0*N*mew**2/(3*k*T); #susceptibility\n",
- "\n",
- "#Result\n",
- "print \"susceptibility is\",round(chi*10**7,2),\"*10**-7\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "susceptibility is 5.65 *10**-7\n"
- ]
- }
- ],
- "prompt_number": 11
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 13.5, Page number 260"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "rho=4370; #density(kg/m**3)\n",
- "NA=6.02*10**26; #avagadro number(k/mole)\n",
- "M=168.5; #molecular weight(kg/kmol)\n",
- "mew0=4*math.pi*10**-7; #permitivity of free space(H/m)\n",
- "k=1.38*10**-23; #boltzmann constant(J/K)\n",
- "T=300; #temperature(K)\n",
- "H=2*10**5; #electric field(A/m)\n",
- "mew=2*9.27*10**-24; \n",
- "\n",
- "#Calculation\n",
- "N=rho*NA/M; \n",
- "chi=mew0*N*mew**2/(3*k*T); #susceptibility\n",
- "M=chi*H; #magnetisation(A/m)\n",
- "\n",
- "#Result\n",
- "print \"susceptibility is\",round(chi*10**4,4),\"*10**-4\"\n",
- "print \"magnetisation is\",round(M,3),\"A/m\"\n",
- "print \"answer varies due to rounding off errors\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "susceptibility is 5.4298 *10**-4\n",
- "magnetisation is 108.596 A/m\n",
- "answer varies due to rounding off errors\n"
- ]
- }
- ],
- "prompt_number": 17
- }
- ],
- "metadata": {}
- }
- ]
-}
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