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{
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"name": "",
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"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter21-Magnetic Materials"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex1-pg612"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"##Example 21.1\n",
"##calculation of magnetizing force and relative permeability\n",
"\n",
"##given values\n",
"M=2300.;##magnetization in A/m\n",
"B=.00314;##flux density in Wb/m**2\n",
"u=12.57*10**-7.;##permeability in H/m\n",
"\n",
"##calculation\n",
"H=(B/u)-M;\n",
"print'%s %.2f %s'%('magnetizing force(in A/m)is ',H,'');\n",
"Ur=B/(u*H);\n",
"print'%s %.2f %s'%('relative permeability is',Ur,'')\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"magnetizing force(in A/m)is 198.01 \n",
"relative permeability is 12.62 \n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex2-pg613"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"##Example 21.2\n",
"##calculation of magnetization and magnetic flux density\n",
"\n",
"##given values\n",
"H=10**5;##external field in A/m\n",
"X=5*10**-5;##susceptibility \n",
"u=12.57*10**-7;##permeability in H/m\n",
"\n",
"##calculation\n",
"M=X*H;\n",
"print'%s %.2f %s'%('magnetization (in A/m)is ',M,'');\n",
"B=u*(M+H);\n",
"print'%s %.2f %s'%('magnetic flux density (in wb/m^2) is',B,'')\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"magnetization (in A/m)is 5.00 \n",
"magnetic flux density (in wb/m^2) is 0.13 \n"
]
}
],
"prompt_number": 4
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex3-pg615"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"##Example 21.3\n",
"##calculation of relative permeability\n",
"\n",
"##given values\n",
"\n",
"X=3.7*10**-3;##susceptibility at 300k\n",
"T=300;##temp in K\n",
"T1=200;##temp in K\n",
"T2=500;##temp in K\n",
"\n",
"##calculation\n",
"C=X*T;##curie constant\n",
"XT1=C/T1;\n",
"print'%s %.4f %s'%('relative permeability at T1 is ',XT1,'');\n",
"XT2=C/T2;\n",
"print'%s %.3f %s'%('relative permeability at T2 is',XT2,'')\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"relative permeability at T1 is 0.0056 \n",
"relative permeability at T2 is 0.002 \n"
]
}
],
"prompt_number": 3
}
],
"metadata": {}
}
]
}
|
