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Diffstat (limited to 'Materials_Science/Chapter18.ipynb')
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1 files changed, 0 insertions, 251 deletions
diff --git a/Materials_Science/Chapter18.ipynb b/Materials_Science/Chapter18.ipynb deleted file mode 100755 index 287d3fc7..00000000 --- a/Materials_Science/Chapter18.ipynb +++ /dev/null @@ -1,251 +0,0 @@ -{
- "metadata": {
- "name": "",
- "signature": "sha256:6d6e15c1e7376b50229c166646322c80b0a7d8183966dd1596145061fc9a1c4d"
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
- {
- "cells": [
- {
- "cell_type": "heading",
- "level": 1,
- "metadata": {},
- "source": [
- "Chapter18:Magnetic Materials"
- ]
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Ex18.1:pg-346"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Example 18.1 : magnetization and flux density\n",
- "import math\n",
- "#given data :\n",
- "mu0=4*math.pi*10**-7;\n",
- "H=10**4;# in A/m\n",
- "Xm=3.7*10**-3;# room temperature\n",
- "mu_r=1+Xm;\n",
- "B=mu0*mu_r*H;\n",
- "M=Xm*H;\n",
- "print B,\"= the flux density,B(Wb/m**2) \"\n",
- "print M,\"= magnetization,M(A/m) \"\n"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "0.0126128661856 = the flux density,B(Wb/m**2) \n",
- "37.0 = magnetization,M(A/m) \n"
- ]
- }
- ],
- "prompt_number": 1
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Ex18.2a:pg-350"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Example 18.2.a : saturation magnetization\n",
- " \n",
- "#given data :\n",
- "mu_b=9.27*10**-24;# A.m**2\n",
- "p=8.9; # in g/cm**3\n",
- "Na=6.023*10**23;# avogadro's number\n",
- "A=58.71; # in g/mol\n",
- "n=((p*Na)/A)*10**6;\n",
- "Ms=0.60*mu_b*n;\n",
- "print Ms,\"= saturation magnetization,Ms(A/m) \"\n",
- "# the answe ris slightly different in textbook due to approximation"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "507834.0 = saturation magnetization,Ms(A/m) \n"
- ]
- }
- ],
- "prompt_number": 2
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Ex18.2b:pg-350"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Example 18.2.b : saturation flux density\n",
- "import math\n",
- "#given data :\n",
- "\n",
- "mu0=4*math.pi*10**-7;\n",
- "mu_b=9.27*10**-24;# A.m**2\n",
- "p=8.9; # in g/cm**3\n",
- "Na=6.023*10**23;# avogadro's number\n",
- "A=58.71; # in g/mol\n",
- "n=((p*Na)/A)*10**6;\n",
- "Ms=0.60*mu_b*n;\n",
- "Bs=mu0*Ms;\n",
- "print round(Bs,2),\"= saturation flux density,Bs(tesla) \"\n"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "0.64 = saturation flux density,Bs(tesla) \n"
- ]
- }
- ],
- "prompt_number": 4
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Ex18.3:pg-351"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Example 18.3 : magnetic moment\n",
- "import math \n",
- "#given data :\n",
- "\n",
- "mu0=4*math.pi*10**-7;\n",
- "mu_b=9.27*10**-24;# A.m**2\n",
- "p=8.9; # in g/cm**3\n",
- "Na=6.023*10**23;# avogadro's number\n",
- "A=58.71; # in g/mol\n",
- "n=((p*Na)/A)*10**6;\n",
- "Bs=0.65;#in Wb/m**2\n",
- "Ms=Bs/mu0;\n",
- "m_mu_b=Ms/n;\n",
- "print round(m_mu_b,26),\" is saturation magnetisation,m_mu_b(A.m**2) \"\n"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "5.67e-24 is saturation magnetisation,m_mu_b(A.m**2) \n"
- ]
- }
- ],
- "prompt_number": 11
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Ex18.4:pg-355"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Example 18.4 : power loss\n",
- " \n",
- "#given data :\n",
- "V=0.01;#in m**3\n",
- "f=50;# in Hz\n",
- "area=600;#in jm**-1\n",
- "Wh=area*V*f;\n",
- "print Wh,\"= power loss,Wh(watts) \"\n"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "300.0 = power loss,Wh(watts) \n"
- ]
- }
- ],
- "prompt_number": 12
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Ex18.5:pg-355"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Example 18.4 : los of energy\n",
- " \n",
- "#given data :\n",
- "mass=10.0;# in kg\n",
- "energy_loss=250.0;# in J/m**2\n",
- "#energy loss at the rate of 50 cycles/s\n",
- "E=energy_loss*50.0;# in J/m**3\n",
- "E_loss=E*3600.0;#in J/m**3\n",
- "D=7500.0;#density in kg/m**3\n",
- "Volume=mass/D;\n",
- "energy_loss_per_hour=E_loss/Volume;\n",
- "print energy_loss_per_hour,\"= energy_loss_per_hour(J/hour) \"\n",
- "\n",
- "# answer is incorrect in textbook"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "33750000000.0 = energy_loss_per_hour(J/hour) \n"
- ]
- }
- ],
- "prompt_number": 22
- }
- ],
- "metadata": {}
- }
- ]
-}
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