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diff --git a/Engineering_Physics_by_Bhattacharya_Bhaskaran/Chapter8.ipynb b/Engineering_Physics_by_Bhattacharya_Bhaskaran/Chapter8.ipynb new file mode 100755 index 00000000..00903a6d --- /dev/null +++ b/Engineering_Physics_by_Bhattacharya_Bhaskaran/Chapter8.ipynb @@ -0,0 +1,133 @@ +{ + "metadata": { + "name": "Chapter8" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": "Magnetic Materials" + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example number 8.1, Page number 238" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "#To calculate the magnitude and direction of magnetic moment\n\n#importing modules\nimport math\n\n#Variable declaration\nI = 12; #current(Ampere)\nA = 7.5*10**-4 #area of loop(m**2)\n\n#Calculation\nM = I*A; #magnetic moment(Am**2)\nM = M*10**3;\n\n#Result\nprint \"magnetic moment is\",M,\"*10**-3 Am**2\"\nprint \"M is directed away from the observer and is perpendicular to the plane of the loop\"", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "magnetic moment is 9.0 *10**-3 Am**2\nM is directed away from the observer and is perpendicular to the plane of the loop\n" + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example number 8.2, Page number 238" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "#To calculate the magnetic moment\n\n#importing modules\nimport math\n\n#Variable declaration\nr = 0.5; #radius of orbit(Angstrom)\ne = 1.6*10**-19; #charge of electron(C)\nnew = 10**16; #frequency(rps)\n\n#Calculation\nr = r*10**-10; #radius of orbit(m)\nI = e*new; #current(Ampere)\nA = math.pi*r**2; #area enclosed(m**2)\nM = I*A; #magnetic moment(Am**2)\n\n#Result\nprint \"magnetic moment is\",M,\"Am**2\"", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "magnetic moment is 1.25663706144e-23 Am**2\n" + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example number 8.3, Page number 239" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "#To calculate the magnetic susceptibility\n\n#importing modules\nimport math\n\n#Variable declaration\nmew_r = 5000; #relative permeability\n\n#Calculation\nchi_m = mew_r-1; #magnetic susceptibility\n\n#Result\nprint \"magnetic susceptibility is\",chi_m", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "magnetic susceptibility is 4999\n" + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example number 8.4, Page number 239" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "#To calculate the permeability\n\n#importing modules\nimport math\n\n#Variable declaration\nH = 1800; #magnetic field(A/m)\nphi = 3*10**-5; #magnetic flux(Wb)\nA = 0.2; #cross sectional area(cm**2)\n\n#Calculation\nA = A*10**-4; #cross sectional area(m**2)\nB = phi/A; #magnetic flux density(Wb/m**2)\nmew = B/H; #permeability(H/m)\nmew = mew*10**4;\nmew=math.ceil(mew*100)/100; #rounding off to 2 decimals\n\n#Result\nprint \"permeability is\",mew,\"*10**-4 H/m\"", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "permeability is 8.34 *10**-4 H/m\n" + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example number 8.5, Page number 239" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "#To calculate the magnetic moment\n\n#importing modules\nimport math\n\n#Variable declaration\nB = 0.65; #magnetic induction(Wb/m**2)\nrho = 8906; #density(kg/m**3)\nM = 58.7; #atomic weight\nmew0 = 4*math.pi*10**-7;\nmb = 9.27*10**-24;\nNa = 6.023*10**26; #avagadro constant\n\n#Calculation\nN = rho*Na/M; #number of atoms per unit volume(atoms/m**3)\nmew_r = B/(N*mew0); #relative permeability(A/m**2)\nM = mew_r/mb; #magnetic moment in mew_B \nM=math.ceil(M*10**3)/10**3; #rounding off to 3 decimals\n\n#Result\nprint \"magnetic moment is\",M,\"mew_B\"", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "magnetic moment is 0.611 mew_B\n" + } + ], + "prompt_number": 6 + }, + { + "cell_type": "code", + "collapsed": false, + "input": "", + "language": "python", + "metadata": {}, + "outputs": [] + } + ], + "metadata": {} + } + ] +}
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