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diff --git a/Engineering_Physics_by_A._Marikani/Chapter_12.ipynb b/Engineering_Physics_by_A._Marikani/Chapter_12.ipynb new file mode 100755 index 00000000..dba2b7b8 --- /dev/null +++ b/Engineering_Physics_by_A._Marikani/Chapter_12.ipynb @@ -0,0 +1,300 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:40ea4bb009666aeba2b07d31c3573a833c155d9ac8e902b20b5967865ae89dbb" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "Superconducting Materials" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example number 12.1, Page number 356" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "\n", + "#importing modules\n", + "import math\n", + "\n", + "#Variable declaration\n", + "Tc=3.7; #critical temperature in K\n", + "H0=0.0306; #magnetic field in T\n", + "T=2; #temperature in K\n", + "\n", + "#Calculation\n", + "Hc=H0*(1-(T**2/Tc**2));\n", + "Hc=math.ceil(Hc*10**5)/10**5; #rounding off to 5 decimals\n", + "\n", + "#Result\n", + "print(\"critical field in T is\",Hc);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "('critical field in T is', 0.02166)\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example number 12.2, Page number 356" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "\n", + "#importing modules\n", + "import math\n", + "\n", + "#Variable declaration\n", + "Tc=7.26; #critical temperature in K\n", + "H0=6.4*10**3; #magnetic field in T\n", + "T=5; #temperature in K\n", + "\n", + "#Calculation\n", + "Hc=H0*(1-(T**2/Tc**2));\n", + "Hc=math.ceil(Hc*10**3)/10**3; #rounding off to 3 decimals\n", + "\n", + "#Result\n", + "print(\"critical field in T is\",Hc);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "('critical field in T is', 3364.385)\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example number 12.3, Page number 357" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "#importing modules\n", + "import math\n", + "\n", + "#Variable declaration\n", + "Tc1=4.185; #critical temperature in K\n", + "M1=199.5; #atomic mass\n", + "M2=203.4; #atomic mass after changing\n", + "\n", + "#Calculation\n", + "#according to maxwell equation Tc*M^0.5=constant\n", + "#Tc1*M1^0.5=Tc2*M2^0.5\n", + "Tc2=(Tc1*M1**0.5)/M2**0.5;\n", + "Tc2=math.ceil(Tc2*10**6)/10**6; #rounding off to 6 decimals\n", + "\n", + "#Result\n", + "print(\"critical temperature of Hg in K is\",Tc2);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "('critical temperature of Hg in K is', 4.144685)\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example number 12.4, Page number 357" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "\n", + "#importing modules\n", + "import math\n", + "\n", + "#Variable declaration\n", + "d=1; #diameter of wire in mm\n", + "T=4.2; #temperature in K\n", + "Tc=7.18; #critical temperature in K\n", + "H0=6.5*10**4; #magnetic field\n", + "\n", + "#Calculation\n", + "d=d*10**-3; #diameter in m\n", + "R=d/2;\n", + "Hc=H0*(1-(T**2/Tc**2));\n", + "HC=Hc/10**4;\n", + "HC=math.ceil(HC*10**3)/10**3; #rounding off to 2 decimals\n", + "Ic=2*math.pi*R*Hc;\n", + "Ic=math.ceil(Ic*10**2)/10**2; #rounding off to 2 decimals\n", + "A=math.pi*R**2;\n", + "J=Ic/A;\n", + "J=J/10**8;\n", + "J=math.ceil(J*10**5)/10**5; #rounding off to 5 decimals\n", + "\n", + "#Result\n", + "print(\"critical magnetic field at 4.2K in A/m is\",HC,\"*10**4\");\n", + "print(\"critical current in A is\",Ic);\n", + "print(\"critical current density in A/m^2 is\",J,\"*10**8\");" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "('critical magnetic field at 4.2K in A/m is', 4.276, '*10**4')\n", + "('critical current in A is', 134.33)\n", + "('critical current density in A/m^2 is', 1.71035, '*10**8')\n" + ] + } + ], + "prompt_number": 15 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example number 12.5, Page number 358" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "#importing modules\n", + "import math\n", + "\n", + "#Variable declaration\n", + "e=1.6*10**-19;\n", + "h=6.626*10**-34;\n", + "V=6; #voltage applied in micro volts\n", + "\n", + "#Calculation\n", + "V=V*10**-6; #converting micro volts to volts\n", + "new=(2*e*V)/h;\n", + "new=new/10**9;\n", + "new=math.ceil(new*10**4)/10**4; #rounding off to 4 decimals\n", + "\n", + "#Result\n", + "print(\"frequency of ac signal in Hz is\",new,\"*10**9\");" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "('frequency of ac signal in Hz is', 2.8977, '*10**9')\n" + ] + } + ], + "prompt_number": 16 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example number 12.6, Page number 358" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "\n", + "#importing modules\n", + "import math\n", + "\n", + "#Variable declaration\n", + "Kb=1.38*10**-23;\n", + "Tc=7.19; #critical temperature in K\n", + "\n", + "#Calculation\n", + "Eg=3.5*Kb*Tc;\n", + "Eg=Eg/(1.6*10**-19); #converting J to eV\n", + "Eg=Eg*10**3; #converting eV into milli eV\n", + "Eg=math.ceil(Eg*10**3)/10**3; #rounding off to 3 decimals\n", + "\n", + "#Result\n", + "print(\"band gap of superconducting lead in meV is\",Eg);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "('band gap of superconducting lead in meV is', 2.171)\n" + ] + } + ], + "prompt_number": 17 + }, + { + "cell_type": "code", + "collapsed": false, + "input": [], + "language": "python", + "metadata": {}, + "outputs": [] + } + ], + "metadata": {} + } + ] +}
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